Explore calculators in this category.
Determine ventilation effectiveness by calculating how many times the air in a room is replaced each hour.
Estimate cooling capacity needed for a room.
Estimate the attic fan CFM and intake vent area needed from square footage, height, and climate adjustment.
Project payback period and lifetime savings for plug-and-play balcony solar kits using production, tariffs, and export credits.
Determine the total feet of baseboard trim required after subtracting door and window openings.
Calculate lumber volume in board feet using thickness, width, and length.
Determine the board feet of a piece of lumber from its thickness, width, and length in inches.
Find the capacity of a box from its length, width, and height. Enter the three dimensions in meters to calculate the volume in cubic meters.
Estimate the total price of bricks based on quantity and cost per brick. Enter the values and press Calculate.
Estimate how many bricks are needed to build a wall.
Calculate the total cost of carpet materials by multiplying room area by the price per square foot.
Recommend fan blade span based on room area.
Calculate how many gallons of paint are needed for a ceiling by multiplying area by coats and dividing by paint coverage.
Determine the overall carbon-to-nitrogen ratio when mixing green and brown compost materials.
Volume for a slab in cubic meters.
Determine total curtain width needed using a fullness ratio.
Estimate number of decking boards needed for a project.
Estimate when stamped or polished concrete is ready for foot traffic, heavy work, sealing, and service.
Cable length needed from desk to outlet.
Divide one number by another to find the quotient.
Calculate the slope needed for proper drainage in plumbing or landscaping.
Estimate weekly water applied by a drip irrigation zone from emitter count, flow rate, runtime, and watering frequency.
Estimate the number of drywall sheets needed from total wall area and sheet dimensions.
Estimate the number of drywall sheets needed.
Estimate drywall weight from coverage area and panel thickness to plan safe handling, delivery, and structural loads.
Estimate monthly electricity cost of an appliance.
See the cash shortfall after insurance, savings, and deductibles plus financing payments for emergency roof work.
Estimate the payback period for Energy Star window upgrades after rebates, U-factor improvements, and energy savings.
Compare panel upgrade costs with off-peak charging savings and incentives to find breakeven timing.
Estimate how many litres of paint are required to cover a fence based on dimensions and product coverage.
Estimate concrete volume for fence posts.
Estimate number of posts needed for a straight fence.
Determine how many fence posts you need for a straight fence based on total length and spacing between posts.
Tiles needed to cover a rectangular floor.
Estimate material costs for new flooring based on room size and price per square meter.
Plan how many gallons of epoxy coating you need for a garage floor based on square footage and product coverage.
Find ramp slope percentage from rise and run.
Compute soil volume for a rectangular bed (m³).
Estimate total soil weight for a rectangular garden bed using dimensions and soil density.
Work out how quickly a ground-source heat pump can repay itself. Enter the turnkey installation price, all rebates or tax credits, and the annual savings you expect from lower utility bills plus reduced maintenance to see the breakeven timeline in years.
Size a residential geothermal system, estimate installed cost after incentives, and project annual energy savings.
Determine the amount of grass seed required by dividing lawn area by the coverage rate provided on the seed bag.
Balance greywater supply, irrigation demand, and storage needs to plan compliant reuse systems for landscapes.
Compare yearly operating cost and emissions for a heat pump versus a gas furnace using load, COP, and utility rates.
Compare annual operating costs and emissions for a heat pump versus a gas furnace and find the gas price breakeven.
Estimate the seasonal operating cost difference between a heat pump and a gas furnace. Enter your annual heating load, heat pump COP, electricity rate, furnace AFUE, and local gas price to see which system is cheaper and by how much.
Stack federal credits with state and utility rebates to reveal your net heat pump water heater cost and payback timeline.
Estimate monthly demand-charge savings from shifting EV charging into off-peak windows with a time-of-use plan.
Determine the recommended size of a standby generator by combining your running load, the largest startup surge, and a safety margin. Enter wattages for essential circuits and choose a buffer percentage.
Enter daily energy demand, panel watt rating, and average sun hours to estimate how many panels are required.
Project net savings, payback period, and ROI for a residential solar array with optional export credits and degradation.
Estimate runtime and fuel spend for a standby generator using load, tank size, hourly burn, and fuel price.
Estimate how much acoustic treatment your room needs to hit a target decibel reduction based on room geometry and existing absorption.
Compare warranty premiums, deductibles, and denial risk with expected repairs to find breakeven claim volume and net savings.
See how quickly utility, ventilation, and rebate savings repay the upfront cost of switching a kitchen from gas to induction.
Determine the insulation thickness needed to reach a target R-value and estimate project cost based on material conductivity, area, and existing insulation.
Figure out how many insulation rolls to purchase based on area coverage.
Estimate how much volatile organic compound (VOC) mass is released from paint and how long to ventilate for a 90% reduction at a given air exchange rate.
Layer Inflation Reduction Act state rebates with federal tax credits to reveal net project cost, total incentives, and simple payback from annual energy savings.
Estimate the equity added by a kitchen remodel after financing interest costs are repaid.
Find the ladder length needed to reach a height from a set distance.
Estimate how long it will take to mow a lawn based on area, mower width, and walking speed.
Estimate how many minutes are required to water a lawn to a desired depth. Enter area, desired water depth, and sprinkler flow rate, then press Calculate.
Estimate energy cost savings by replacing incandescent bulbs with LEDs.
Required current for an LED strip.
Estimate sky-brightness gains and resulting Bortle class after cutting lumens, adding shielding, and trimming runtime.
Estimate how many boxes you need for a move.
Estimate how many cubic yards of mulch are needed based on coverage area and desired depth. Input the area in square feet and depth in inches to plan your order.
Estimate how much a paint project will cost based on area, paint coverage and price per gallon.
Estimate drying time based on humidity.
Estimate how many liters of paint you need based on surface area, product coverage, and desired number of coats.
Determine how many plants fit in a garden bed by combining bed size with the spacing recommended for your crop.
Estimate daily pool water loss in litres using surface area, temperature, humidity, and wind speed. Plan top-ups, cover strategies, and chemical adjustments based on local weather conditions.
Add up chemicals, energy, supplies, and service extras to forecast your annual residential pool upkeep budget.
Volume of concrete needed for a cylindrical post hole.
Estimate annual tax savings, payback, and multi-year upside before filing a property tax assessment appeal.
Estimate how long it takes to fill a rain barrel from a hose or pump by combining barrel volume and flow rate, with readable hour/minute outputs.
Size a residential rain garden by combining catchment area, design storm depth, soil infiltration, and storage depth.
Estimate water capacity of a gutter section.
Estimate collected rainwater volume from roof size and rainfall.
Approximate how much rainwater a roof can collect from a single rainfall event.
Estimate monthly capture and suggest a cistern size by combining roof area, rainfall, runoff coefficient, and demand.
Estimate total renovation cost by combining materials, labor, and a contingency percentage.
Check if your existing service panel can support a Level 2 EV charger alongside current continuous loads.
Model home solar cash flow with incentives, energy usage, rate escalation, and production forecasts to see net cost, simple payback, and long-horizon ROI in one narrative summary.
Estimate the surface area of a simple gable roof. Enter the building footprint dimensions and roof pitch to compute the total roof area.
Convert roof rise and run into pitch angle in degrees.
Estimate bundles of shingles needed for a roof.
Estimate weight of snow on a roof.
Estimate cooling capacity from room area.
Estimate required heating output by multiplying room area by a BTU per square foot factor.
Calculate recommended lumens for a room based on area and desired brightness.
Calculate total shelf load based on per-shelf capacity and number of shelves.
Estimate annual heating or cooling savings from daily temperature setbacks using a rule-of-thumb efficiency factor.
Daily energy from solar panels based on wattage and sun hours.
Calculate annual savings by combining sunlight hours, panel wattage, number of panels and electricity cost.
Compare a solar PPA to loan-financed ownership by modeling payments, incentives, escalators, and long-term savings.
Determine number of steps for a staircase.
Plan stair framing by entering total rise, target riser height, and tread depth. Receive total stringer length, final riser height, and total run to guide layout.
Calculate suitcase capacity from dimensions.
Divide sump pit volume by the time in minutes you want it drained to determine pump capacity.
Estimate the number of tiles needed including waste.
Approximate the amount of grout needed based on area and joint dimensions.
Estimate clothesline length needed for hand-washed laundry.
Give raised beds and containers time to rebound after intensive crops. This planner blends crop maturity, nutrient demand, soil organic matter, and cover-crop downtime to suggest a rest interval that protects microbial life and yields.
Estimate how many studs you need for a straight wall run by combining plate length and on-centre spacing. Ideal for framing takeoffs, lumber shopping lists, and code-compliant layouts.
Estimate how many rolls of wallpaper you need.
Enter daily water use and the expected percentage reduction to see yearly savings.
Convert water hardness from parts per million to grains per gallon.
Estimate how long a water heater takes to reheat a full tank.
Determine the ramp length needed for a given rise and slope ratio.
See how quickly a radon mitigation system pays back by balancing installation cost, energy impact, resale premium, and ownership horizon.
Weigh whole-house surge protector costs against expected avoided damage to see payback and ROI.
Estimate annual energy savings, added consumption risk, and simple payback when adding a whole-house dehumidifier to trim HVAC runtime.
Blend mitigation cost, insurance premium discounts, and wildfire probability to gauge payback and expected net benefit of home hardening.
