56 free tools · Private · In-Browser

Home & DIY Tools

Material estimates for home and garden projects: gravel, sand and concrete, paint coverage, deck boards and fence pickets, flooring and tile, mulch and landscape fabric, plus board feet for lumber. Measure once, enter the numbers, and buy the right amount.

Closet Rod Capacity Calculator

Calculate hanger capacity from rod length and spacing per hanger. Everything is computed locally in your browser, with no uploads and no sign-ups.

Golden Ratio Calculator

Free golden ratio calculator: enter one value to get the golden-ratio partner and the two segments of a golden division, in your browser.

Moving Box Volume Calculator

Calculate total moving-box volume from a box count and volume each. Everything is calculated locally in your browser, with no uploads or sign-ups.

Paint Quantity Calculator

Free paint calculator: enter wall dimensions, coats, and coverage to estimate how many litres or gallons of paint you need, in your browser.

TV Viewing Distance

Free TV viewing distance calculator: enter a screen size to get the recommended seating range for comfortable and cinematic viewing, in your browser.

Blind Slat Count Calculator

Calculate the number of blind slats from window height and slat pitch. Everything is calculated locally in your browser, with no uploads or sign-ups.

Mortar Bag Calculator

Estimate whole mortar bags from wall area, product coverage per bag, and a waste allowance using your own project figures in your browser without uploads.

Board Foot Calculator

Free board foot calculator for lumber: enter thickness, width, length, and quantity to get board feet and total, computed locally in your browser.

Drip Irrigation Flow Calculator

Calculate total drip-system flow from the emitter count and flow each. Everything is calculated locally in your browser, with no uploads or sign-ups.

Landscape Fabric Roll Calculator

Calculate landscape fabric rolls from bed area, roll coverage, and overlap. Everything is calculated locally in your browser, with no uploads or sign-ups.

Cabinet Paint Area Calculator

Calculate total cabinet door area from a door count and average area each. Everything is calculated locally in your browser, with no uploads or sign-ups.

Cabinet Pull Placement Calculator

Calculate the pull center position on a drawer from width and a placement percentage. It runs entirely in your browser — no uploads or accounts.

Drywall Sheet Calculator

Estimate drywall sheet count from wall area, sheet size, and waste percentage with local math. It runs entirely in your browser, with no uploads or accounts.

Engine Displacement Calculator

Free engine displacement calculator with an immediate result. It calculates total piston displacement from geometry privately in your browser.

Insulation R Value Calculator

Calculate total insulation R value from layers, thickness, and R per inch using local browser math. It runs locally in your browser with no uploads.

Ladder Angle Calculator

Free ladder angle calculator with labeled inputs and an immediate result. It checks ladder angle from rise and base distance privately in your browser.

Rain Barrel Yield Calculator

Free rain barrel yield calculator with labeled inputs and an immediate result. It estimates roof runoff from rainfall depth privately in your browser.

Ramp Slope ADA Calculator

Calculate ramp run from rise and slope ratio, then compare against the common 1 to 12 guideline. It runs entirely in your browser, with no uploads or accounts.

Roof Pitch Calculator

Free roof pitch calculator: enter rise and run to get the pitch ratio, angle in degrees, and rafter slope factor, computed locally in your browser.

Tile Calculator

Free tile calculator: enter the area and tile size to get the number of tiles and boxes needed, including a waste allowance, in your browser.

Tire Size Comparison Calculator

Compare tire diameter change, speedometer error, and actual speed from old and new tire diameters. It runs entirely in your browser — no uploads or accounts.

Trailer Tongue Weight Calculator

Calculate tongue weight and axle load from trailer weight and a tongue percentage. It runs entirely in your browser — no uploads or accounts.

Backsplash Tile Count Calculator

Calculate tiles and boxes for a backsplash from area, coverage, box size, and waste. It runs entirely in your browser — no uploads or accounts.

Brick Calculator

Free brick calculator: estimate how many bricks a wall needs from its area, with waste allowance, in your browser.

BTU Calculator

Free BTU calculator: estimate the cooling or heating capacity a room needs from its size, computed locally in your browser.

Ceiling Fan Size Helper

Free ceiling fan size helper that suggests a fan span band from room area. Review labeled assumptions and a worked result calculated privately in your browser.

Cinder Block Calculator

Estimate concrete block count from wall length, height, block face area, and waste percent. It runs entirely in your browser, with no uploads or accounts.

Concrete Volume Calculator

Free concrete calculator: enter length, width, and depth to get the volume in cubic yards and metres plus an estimated bag count, in your browser.

Curtain Panel Fullness Calculator

Calculate curtain fabric width from window width, fullness ratio, and panel count. It runs entirely in your browser — no uploads or accounts.

Deck Board Calculator

Estimate deck boards from deck width, board width, gap, length, and waste percent. It runs entirely in your browser — no uploads or accounts.

EV Charging Cost Calculator

Free ev charging cost calculator with labeled inputs and an immediate result. It estimates charging cost from energy and tariff privately in your browser.

EV Charging Time Calculator

Free ev charging time calculator with labeled inputs and an immediate result. It estimates charging hours from energy and power privately in your browser.

Fence Picket Calculator

Estimate fence pickets from run length, picket width, gap, gates, and waste with browser-only math. It runs locally in your browser with no uploads.

Fence Rail Board Calculator

Calculate fence rails and bundles from sections, rails per section, bundle size, and waste. It runs entirely in your browser, with no uploads or accounts.

Fertilizer NPK Calculator

Calculate fertilizer pounds needed from target nitrogen, product N percent, and lawn area. It runs entirely in your browser — no uploads or accounts.

Flooring Calculator

Free flooring calculator: enter room area and the coverage per box to get how many boxes of flooring you need with waste, in your browser.

Garage Epoxy Kit Calculator

Calculate epoxy kits from floor area, coats, kit coverage, and waste. Everything is calculated locally in your browser, with no uploads or sign-ups.

Gear RPM Change Calculator

Calculate new engine RPM from old RPM and a new and old gear ratio. Everything is calculated locally in your browser, with no uploads or sign-ups.

Generator Sizing Calculator

Estimate generator wattage from running watts, largest starting surge, and reserve margin. It runs entirely in your browser — no uploads or accounts.

Gravel Calculator

Free gravel calculator: estimate how much gravel you need by area and depth, in cubic yards and tons, in your browser.

Mulch Bag Count Calculator

Calculate mulch bags from area, depth, bag size, and waste. Everything is computed locally in your browser, with no uploads and no sign-ups.

Mulch Calculator

Free mulch calculator: find how much mulch you need by area and depth, in cubic yards and bags, computed in your browser.

Paver Base Calculator

Calculate paver base bags from area, depth, bag volume, and waste. Everything is calculated locally in your browser, with no uploads or sign-ups.

Pool Volume Calculator

Free pool volume calculator: find the gallons in a rectangular pool from its size and average depth, in your browser.

Rain Barrel Yield Estimator

Estimate rainwater harvest from roof area, rainfall inches, and collection efficiency. It runs entirely in your browser — no uploads or accounts.

Raised Bed Soil Calculator

Free raised bed soil calculator with labeled inputs and an immediate result. It calculates soil volume for a rectangular bed privately in your browser.

Ramp Slope Calculator

Free ramp slope calculator with labeled inputs and an immediate result. It reports rise-to-run ratio, grade, and angle privately in your browser.

Rebar Spacing Calculator

Estimate rebar line count and total length for a slab grid from dimensions and spacing. It runs entirely in your browser — no uploads or accounts.

Roofing Calculator

Free roofing calculator: estimate roofing squares and shingle bundles from roof area and waste percent, calculated locally in your browser.

Sand Calculator

Calculate sand volume and weight from area, depth, and density using manual project inputs. It runs entirely in your browser, with no uploads or accounts.

Shelf Board Count Calculator

Calculate shelf boards from wall width, shelf count, board length, and waste. Everything is calculated locally in your browser, with no uploads or sign-ups.

Solar Panel Count Estimator

Estimate panel count from monthly kWh target, sun hours, system efficiency, and panel wattage. It runs entirely in your browser, with no uploads or accounts.

Stair Calculator

Free stair calculator: enter the total rise to get the number of steps, the rise per step, and a suggested tread depth, computed in your browser.

Topsoil Calculator

Calculate topsoil cubic yards from area, depth, and waste percentage with private local math. It runs entirely in your browser, with no uploads or accounts.

Wallpaper Calculator

Free wallpaper calculator: estimate how many rolls a room needs from its walls, with waste, computed in your browser.

Wheel Offset Change Calculator

Calculate the offset change and poke from a new and old wheel offset. Everything is calculated locally in your browser, with no uploads or sign-ups.