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Home & DIY
Reddit-sourced calculators and estimators for homeowners, renters, gardeners, and hobbyists — furnace filter sizing, LED bulb replacement, tile and wallpaper estimators, square footage, smart-thermostat savings, closing costs, rent-vs-buy, lawn mowing time, plant watering, snow day, mulch, pool / spa / aquarium volume and stocking, sewing and yarn yardage.
125 tools available
Home Improvement
Tile, wallpaper, paint prep, HVAC filter sizing, thermostat savings, square footage, LED bulb conversion, real-estate closing costs — the recurring r/HomeImprovement and r/DIY pain points.
Garden & Outdoor
Lawn mowing time, plant watering schedules, houseplant light matching, snow-day chance, mulch coverage — built from r/gardening, r/lawncare, r/houseplants, r/parenting threads.
Pool, Spa & Aquarium
Pool, hot tub, and aquarium volume plus stocking — answers the r/aquariums, r/pools, r/hot tubs recurring ‘how many gallons / how many fish’ questions.
Kitchen & Pantry
Yarn, sewing, and pantry-substitution calculators for r/knitting, r/sewing, and r/cooking — fast offline math for crafters and home cooks.
Furnace Filter Size Finder
Find the right filter dimensions and MERV rating for any furnace or return grille.
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LED Bulb Wattage Replacement
Find the LED bulb equivalent for any incandescent or halogen wattage.
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Square Footage Calculator
Compute the square footage of any room or floor plan from length and width.
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Tile & Flooring Calculator
Estimate how many tiles or boxes you need for any floor or wall.
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Wallpaper Rolls Calculator
Estimate the number of wallpaper rolls needed for any wall or room.
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Smart Thermostat Savings Estimator
See how much a programmable or smart thermostat could save on your energy bill.
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Real-Estate Closing Cost Estimator
Estimate buyer closing costs (lender + title + prepaid) for any U.S. home purchase.
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Rent vs Buy Calculator
See whether buying or renting wins over your time horizon in your market.
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Lawn Mowing Time Estimator
Estimate how long it takes to mow your lawn.
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Plant Watering Schedule Calculator
Build a watering schedule for any houseplant based on pot, light, and humidity.
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Houseplant Light Matcher
Match plants to the light your window actually gets.
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Snow Day Probability Calculator
Estimate the chance of a school closure for tomorrow's forecast.
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Mulch, Soil & Gravel Calculator
Estimate how many cubic yards / bags of mulch, soil, or gravel you need.
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Pool Volume Calculator
Compute the gallons in any pool shape (rectangle, oval, round, kidney).
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Hot Tub & Spa Volume Calculator
Estimate the gallons in any hot tub or spa.
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Aquarium Tank Volume Calculator
Compute gallons / liters for any fish tank (rectangle, bowfront, cube, cylinder).
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Aquarium Stocking Calculator
See how many inches of fish your freshwater tank can safely hold.
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Sewing Yardage Calculator
Estimate fabric yardage for sewing a garment from a pattern.
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Coffee-to-Water Ratio Calculator
Find the right coffee-to-water ratio for any brew method.
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Concrete Volume Calculator
Cubic yards (and bag counts) for slabs, footings, posts, and columns.
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Paint Coverage Calculator (DIY)
Gallons and liters for any room with coats and primer adjustment.
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Deck Boards Calculator
Board count and waste from deck dimensions, joist spacing, and board width.
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Induction Hob Wire Sizer
Pick the correct breaker and copper wire for any cooktop.
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Retaining Wall Footing Depth
Estimate the depth you need for a small garden retaining wall.
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Roof Truss Stability
Quick stability check for a small roof truss.
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Fence Material Estimator
Estimate panels, posts, and total cost for a residential fence.
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Carport Beam Span
Pick a rafter depth and beam size for a small carport or pergola.
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Top-Chord-Bearing Beam Span
Find the right wood or LVL beam for a long span.
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Interior Wall Framing
Count studs, plates, cripples, and drywall for a stick-framed wall.
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Room Paint Estimator
Estimate gallons and cost to repaint a room including primer.
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Drywall Repair Cost
Estimate the cost to patch a hole in drywall.
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Heat Pump vs Gas Furnace
Compare annual operating cost of heat pump, gas furnace, and resistance.
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AC Operating Cost
Estimate annual AC cost from SEER, tonnage, and run-hours.
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Renovation Project Estimate
Estimate total renovation cost and weekly cash flow.
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Off-Grid Solar Battery Bank
Estimate the battery bank size (Wh) for an off-grid PV system.
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Hot Tub / Spa Chemical Cost
Estimate the monthly chemical cost of running a hot tub or spa.
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Home Improvement Project ROI
Estimate the break-even and ROI of a home improvement project.
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Custom Home Build Cost
Estimate the cost to build a custom home by size, finish, and region.
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Roof Replacement Cost Estimator
Estimate the full cost of a roof replacement from square footage, material, pitch, and your region.
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HVAC Replacement Cost Estimator
Estimate a full AC or furnace replacement from system size, SEER, and your region.
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Water Heater Cost Estimator
Compare tank, tankless, and heat-pump water heater replacement costs.
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Window Replacement Cost Estimator
Estimate per-window and whole-house window replacement costs by style and material.
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Moving Cost Estimator
Estimate a local or long-distance move from movers, rental truck, packing, and fuel.
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EV Home Charger Cost Calculator
Estimate Level 2 charger hardware, electrical work, and installation cost.
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Aquarium Heater Size Calculator
Find the right aquarium heater wattage from tank volume and temperature delta.
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Home Insulation Payback Calculator
Estimate insulation savings, payback period, and R-value upgrade value.
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Tree Removal Cost Estimator
Estimate tree removal cost from size, access, location, and emergency work.
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Fence Installation Cost Calculator
Estimate a wood, vinyl, or metal fence from linear feet, height, and labor.
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Driveway Paving Cost Estimator
Estimate asphalt, concrete, or gravel driveway replacement costs.
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Garage Door Replacement Cost Calculator
Estimate a new garage door, opener, and installation from size and material.
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Gutter Replacement Cost Estimator
Estimate seamless gutter replacement from linear feet, material, and downspouts.
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Sump Pump Replacement Cost Calculator
Estimate a sump pump replacement from pump type, pit work, and electrical.
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Water Softener Cost Calculator
Estimate a whole-house water softener from size, type, installation, and plumbing.
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Home Painting Cost Estimator
Estimate interior or exterior painting from square footage, prep, and labor.
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Bathroom Remodel Cost Estimator
Estimate a full or partial bathroom remodel from size, fixtures, and finishes.
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Kitchen Cabinet Cost Estimator
Estimate stock, semi-custom, or custom kitchen cabinets from linear feet.
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Basement Waterproofing Cost Estimator
Estimate interior or exterior basement waterproofing from wall length and method.
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Pest Control Cost Estimator
Estimate termite, rodent, or general pest control from home size and treatment.
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Concrete Slab Cost Calculator
Estimate a concrete slab from square footage, thickness, and finish.
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Hardwood Floor Refinishing Cost Calculator
Estimate sanding, staining, and finishing hardwood floors from square footage.
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Chimney Cleaning Cost Estimator
Estimate chimney sweeping and inspection from flue count and access.
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Pressure Washing Cost Calculator
Estimate pressure washing for driveways, siding, roofs, and decks.
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Lawn Mowing Cost Calculator
Estimate weekly or monthly lawn mowing from lot size, frequency, and extras.
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Septic Pumping Cost Calculator
Estimate septic tank pumping and inspection from tank size and access.
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Shed Construction Cost Calculator
Estimate materials, labor, site prep, and total cost for building a backyard shed.
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Deck Construction Cost Calculator
Estimate a new or replacement deck from size, material, height, stairs, and railing.
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Garage Epoxy Floor Cost Calculator
Estimate DIY or professional epoxy coating from area, prep, and coating system.
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Home Security System Cost Calculator
Compare DIY cameras, monitored alarms, and professional security costs.
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Well Pump Replacement Cost Calculator
Estimate submersible or jet well pump replacement from depth, tank, and labor.
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Septic Drain Field Replacement Cost Calculator
Estimate septic drain field replacement by system type, soil, and excavation.
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Sprinkler System Installation Cost Calculator
Estimate irrigation equipment, trenching, controller, backflow, and installation.
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Siding Replacement Cost Calculator
Estimate siding material, removal, trim, wrap, and labor for a replacement.
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Bathroom Tile Installation Cost Calculator
Estimate tile, waterproofing, demolition, and labor for bathroom tile jobs.
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Kitchen Backsplash Cost Calculator
Estimate tile, adhesive, trim, outlets, demolition, and labor for a backsplash.
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Attic Insulation Cost Calculator
Estimate blown-in or batt attic insulation from area, R-value, and air sealing.
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Roof Repair vs Replace Calculator
Compare roof repair cost against a full replacement by age and remaining life.
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Driveway Resurfacing Cost Calculator
Estimate asphalt overlay, sealcoat, concrete resurfacing, and crack repair.
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Pergola Cost Calculator
Estimate a DIY or contractor pergola from size, material, and finish.
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Fire Pit Cost Calculator
Estimate a built-in or portable fire pit from size, material, and gas.
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Deck Stain Cost Calculator
Estimate deck staining from area, stain type, prep, and labor.
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Pool Pump Size Calculator
Find the right pool pump size from pool gallons, filter, and turnover.
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Pool Heater Cost Calculator
Estimate pool heater purchase, installation, and operating cost.
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Sauna Cost Calculator
Estimate a home sauna from size, heater, kit, and installation.
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Radon Mitigation Cost Calculator
Estimate a radon mitigation system from home size, slab, and fan.
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Snow Blower Size Calculator
Find the right snow blower size from driveway and snowfall.
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Home Generator Size Calculator
Find the right whole-home generator from essential loads.
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Ceiling Fan Size Calculator
Find the right ceiling fan size from room dimensions and ceiling height.
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Air Purifier Size Calculator
Find the right air purifier from room size and CADR.
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Dehumidifier Size Calculator
Find the right dehumidifier from room size and moisture level.
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Window AC Size Calculator
Find the right window AC from room size, sun, and occupants.
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Shower Head GPM Calculator
Estimate shower flow rate and water use from GPM and shower time.
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Dryer Vent Cleaning Cost Calculator
Estimate dryer vent cleaning from length, access, and lint buildup.
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Gutter Guard Worth Calculator
Compare gutter guards against cleaning costs and replacement risk.
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Patio Cover Cost Calculator
Estimate a patio cover from size, material, and roof type.
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Greenhouse Cost Calculator
Estimate a greenhouse from size, frame, glazing, and climate control.
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Fireplace Insert Cost Calculator
Estimate a fireplace insert from type, size, and installation.
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Reverse Osmosis Cost Calculator
Estimate an RO system from type, installation, and filter replacement.
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Garbage Disposal Cost Calculator
Estimate garbage disposal replacement from horsepower and installation.
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Smart Lock Cost Calculator
Estimate a smart lock from type, installation, and subscription.
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Entry Door Cost Calculator
Estimate a front entry door from material, size, and installation.
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Wallpaper Cost Calculator
Estimate wallpaper from area, roll size, pattern, and installation.
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Popcorn Ceiling Removal Cost Calculator
Estimate popcorn ceiling removal from area, texture, and testing.
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Stone Veneer Cost Calculator
Estimate stone veneer from area, material, and installation.
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Bathroom Fan Size Calculator
Find the right bathroom fan CFM from room size and fixtures.
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Mini Split Size Calculator
Find the right mini split BTU from room size and heat load.
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Space Heater Size Calculator
Find the right space heater from room size and insulation.
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Garage Heater Size Calculator
Find the right garage heater from garage size and insulation.
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Gas Line Install Cost Calculator
Estimate gas line installation from length, pipe, and labor.
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Electrical Panel Upgrade Cost Calculator
Estimate electrical panel upgrade from amps, service, and labor.
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Gutter Cleaning Cost Calculator
Estimate gutter cleaning from linear feet, stories, and buildup.
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Paver Patio Cost Calculator
Estimate paver patio cost from patio size, base, and material.
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Retaining Wall Cost Calculator
Estimate retaining wall cost from length, height, and material.
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Sod Installation Cost Calculator
Estimate sod installation from lawn area, sod type, and prep.
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Kitchen Remodel Cost Calculator
Estimate a kitchen remodel from size, finishes, and appliances.
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Basement Finish Cost Calculator
Estimate basement finishing from square footage and finishes.
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Room Addition Cost Calculator
Estimate a room addition from size, type, and finishes.
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Solar Battery Cost Calculator
Estimate solar battery storage size, purchase, and payback.
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Countertop Waste Calculator
Estimate countertop material and waste for a kitchen layout.
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French Drain Cost Calculator
Estimate French drain cost from length, depth, and pipe.
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Tankless Water Heater Size Calculator
Find the right tankless water heater size from flow and climate.
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Attic Ventilation Calculator
Find the right attic vent size from attic area and vent type.
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Sewer Line Replacement Cost Calculator
Estimate sewer line replacement from length, depth, and access.
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Junk Removal Cost Calculator
Estimate junk removal from load size, labor, and disposal.
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Generator Running Cost Calculator
Estimate home generator fuel cost per hour and per outage.
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Pool Liner Replacement Cost Calculator
Estimate pool liner replacement from pool size and liner grade.
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