Utility Calculators

These tools handle the small calculations that pop up in daily life — distance and fuel, dates and ages, units and measurements. See our About page for how we build and review tools.

Time & Date

10 tools

• Time Calculator
• Date Calculator
• Day Counter
• Day of the Week Calculator
• Day of Week Calculator
• Time Duration Calculator
• Time Card Calculator
• Time Zone Calculator
• Hours Calculator
• Sleep Calculator

Personal Information

7 tools

• Age Calculator
• Height Calculator
• Weight Calculator
• GPA Calculator
• Grade Calculator
• Bra Size Calculator
• Shoe Size Conversion

Conversions

2 tools

• Conversion Calculator
• Roman Numeral Converter

Energy & Physics

7 tools

• Electricity Calculator
• Voltage Drop Calculator
• Ohms Law Calculator
• Resistor Calculator
• BTU Calculator
• Horsepower Calculator
• Engine Horsepower Calculator

Chemistry

4 tools

• Molarity Calculator
• Molecular Weight Calculator
• Density Calculator
• Mass Calculator

Weather

4 tools

• Heat Index Calculator
• Dew Point Calculator
• Wind Chill Calculator
• Snow Day Calculator

Automotive

5 tools

• Fuel Cost Calculator
• Gas Mileage Calculator
• Mileage Calculator
• Tire Size Conversion
• Speed Calculator

Construction & Materials

7 tools

• Concrete Calculator
• Gravel Calculator
• Mulch Calculator
• Tile Calculator
• Roofing Calculator
• Stair Calculator
• Square Footage Calculator

Fun & Utilities

8 tools

• Tip Calculator
• Love Calculator
• Golf Handicap Calculator
• Dice Roller
• Password Generator
• Female Delusion Calculator
• Schedule 1 Calculator
• GAG Calculator

Economics & Network

3 tools

• GDP Calculator
• IP Subnet Calculator
• Bandwidth Calculator

Sports & Vehicles

1 tools

• Tire Pressure Calculator

Crafts & Sewing

1 tools

• Circle Skirt Calculator

These 59 calculators are free to use on any device. Results are estimates based on standard formulas — not professional advice.