Everyday Tools calculators
Small tools for practical questions.
Plan materials, check a conversion, estimate a trip or work with text and data. Browse by the task at hand, with clear inputs and a method you can check.
Browse the calculatorsA place to start
Tools for common questionsConversion Calculator
Convert compatible length, mass, volume, time and temperature units.
Open calculator →02 / Everyday ToolsConcrete Calculator
Estimate material volume for a rectangular area.
Open calculator →03 / Everyday ToolsTip Calculator
Calculate a tip and divide the bill among a group.
Open calculator →Explore everyday tools
44 toolsHome & materials
8BTU Calculator
Convert heating/cooling capacity between watts and BTU per hour.
Concrete Calculator
Estimate material volume for a rectangular area.
Gravel Calculator
Estimate material volume for a rectangular area.
Mulch Calculator
Estimate material volume for a rectangular area.
Roofing Calculator
Estimate a simple pitched roof area from its footprint.
Square Footage Calculator
Find rectangular floor area.
Stair Calculator
Estimate a straight flight of stairs.
Tile Calculator
Estimate tiles needed for a rectangular floor.
Travel & everyday life
11Bra Size Calculator
Estimate a starting UK bra size from two measurements.
Fuel Cost Calculator
Estimate fuel required and trip cost.
Gas Mileage Calculator
Calculate fuel economy from distance and fuel used.
Golf Handicap Calculator
Estimate a handicap index from 20 score differentials.
Height Calculator
Convert height between centimeters and feet/inches.
Love Calculator
Generate a playful name-based score for entertainment.
Mileage Calculator
Calculate trip distance and mileage reimbursement.
Shoe Size Conversion
Estimate adult shoe size from foot length.
Sleep Calculator
Calculate a bedtime from your wake time and desired sleep duration.
Tip Calculator
Calculate a tip and divide the bill among a group.
Tire Size Calculator
Calculate tire dimensions from metric sidewall markings.
Science & electricity
12Density Calculator
Calculate density from mass and volume.
Electricity Calculator
Estimate electricity use and energy cost.
Engine Horsepower Calculator
Calculate mechanical power from torque and rotational speed.
Horsepower Calculator
Calculate mechanical power from torque and rotational speed.
Mass Calculator
Calculate mass from density and volume.
Molarity Calculator
Calculate molar concentration of a solution.
Molecular Weight Calculator
Calculate molar mass for formulas using common elements.
Ohms Law Calculator
Calculate current and power from voltage and resistance.
Resistor Calculator
Combine resistors in series or parallel.
Speed Calculator
Calculate average speed.
Voltage Drop Calculator
Estimate a two-wire DC circuit voltage drop.
Weight Calculator
Calculate weight as gravitational force.
School, text & digital tools
13Ad Revenue Calculator
Estimate advertising revenue using traffic and rate assumptions.
Bandwidth Calculator
Estimate transfer time from file size and connection speed.
Base64 Encode / Decode
Encode or decode text locally in your browser.
Conversion Calculator
Convert compatible length, mass, volume, time and temperature units.
Dice Roller
Roll fair virtual dice.
GDP Calculator
Calculate GDP using the expenditure approach.
GPA Calculator
Calculate a credit-weighted grade point average.
Grade Calculator
Calculate a weighted grade and the score needed on remaining work.
IP Subnet Calculator
Calculate an IPv4 CIDR network, address range and mask.
Password Generator
Generate a random password locally in your browser.
Roman Numeral Converter
Convert integers from 1 to 3999 into Roman numerals and back.
URL Encode / Decode
Encode or decode text locally in your browser.
Word Counter
Check word and character counts for the text you enter.