Concrete Calculator
Estimate cubic yards, cubic feet and bags of concrete for slabs, footings and posts.
Paint Calculator
Work out how many gallons of paint you need for walls, including doors and windows.
Tile Calculator
Calculate tiles, boxes and waste for floors and walls in seconds.
Drywall Calculator
Estimate the square footage and number of 4x8 or 4x12 drywall sheets for a room.
Wallpaper Calculator
Find how many rolls of wallpaper you need, with pattern matching allowance included.
Flooring Calculator
Calculate square footage and boxes of laminate, vinyl or hardwood flooring.
Gravel Calculator
Get cubic yards and tons of gravel, crushed stone, sand or soil for any depth.
Fence Post Calculator
Count fence posts and bags of concrete per hole from fence length and spacing.
Mulch Calculator
Estimate bags or cubic yards of mulch for garden beds at any depth.
Etsy Fee Calculator
See exactly what Etsy and payment processing take, and what you actually keep.
Amazon FBA Fee Calculator
Estimate referral fees, fulfillment fees and your profit per unit.
PayPal Fee Calculator
See the PayPal fee on any payment and the net amount you receive.
VAT Calculator
Add VAT to a net price or remove it from a gross price at any rate.
Mortgage Calculator
Estimate your monthly payment, total interest and payoff time for any loan.
Percentage Calculator
Find X% of a number, what percent one number is of another, and percentage changes.
Age Calculator
Get your exact age in years, months and days — plus days until your next birthday.
Tip Calculator
Work out the tip, total and per-person share when splitting a bill.
Electricity Cost Calculator
See what an appliance costs to run per day, month and year from its wattage.
Fuel Cost Calculator
Estimate the fuel cost of a trip from distance, MPG and gas price.
Due Date Calculator
Estimate your due date and pregnancy week from your last period.
eBay Fee Calculator
See the final value fee on a sale and what you keep after eBay fees.
Stripe Fee Calculator
See the payment processing fee and the amount you actually receive.
Shopify Profit Calculator
Find real profit per order after product cost, shipping, fees and ads.
Square Footage Calculator
Get a room's area in square feet, yards and meters.
Tile Adhesive Calculator
Estimate bags of thinset or tile adhesive for any tiled area.
Board Foot Calculator
Calculate lumber in board feet from thickness, width, length and quantity.
Fence Picket Calculator
Count how many pickets a fence needs from length, width and gap.
Date Difference Calculator
Find days, weeks, months and years between any two dates.
BMI Calculator
Calculate body mass index with standard WHO categories.
Roofing Calculator
Estimate roof squares and shingle bundles from footprint and pitch.
Siding Calculator
Estimate siding squares from wall dimensions, including waste.
Sod Calculator
Find how many square feet and pallets of sod your lawn needs.
Compound Interest Calculator
See how savings grow with monthly, quarterly or annual compounding.
Discount Calculator
Work out the sale price and your savings from any percent-off offer.
Hourly Wage Calculator
Convert salary to hourly, daily and monthly pay — and back.
Savings Goal Calculator
See how many months it takes to reach your savings target.
Wallpaper Paste Calculator
Estimate gallons of wallpaper adhesive for your wall area.
Rebar Calculator
Estimate linear feet and pieces of rebar for a slab.
Stud Calculator
Count wall studs from wall length and spacing.