Free Online Calculators and Converters
Octo Calculator is a collection of online calculators and converters built for everyday use. Whether you need to calculate a tip, convert a hex colour code, work out compound interest, or roll a dice. Every calculator and converter on Octo Calculator is free to use with no limits, no account required, and no paid tier.
Finance
- Profit Margin Calculator
- Break-even Calculator
- Revenue Calculator
- Business Budget Calculator
- Business Expenses Calculator
- Markup Calculator
- Commission Calculator
- Lifetime Value (LTV) Calculator
Math
- Percentage Calculator
- Percentage Increase
- Percentage Decrease
- Percent Difference
- Percentage Change
- Percent to Decimal
- Decimal to Percent
- Average Calculator
Randomizers
- Random Number Generator
- Random Number Generator 1-10
- Random Number Generator 1-100
- Random List Generator
- Random Name Picker
- Random Team Generator
- Secret Santa Generator
- Gift Exchange Generator
Digital & Tech
- IP Subnet Calculator
- Data Transfer Calculator
- Download Time Calculator
- Upload Time Calculator
- Website/Hosting Bandwidth Calculator
- Mbps to MB/s Converter
- Mbps to GB Converter
- Uptime Calculator
Color
- WCAG Contrast Checker
- Color Palette Generator
- Shades and Tints Generator
- Color Mixer
- Color Blindness Simulator
- HEX to RGB
- RGB to HEX
- HEX to HSL
Converters
- Weight Converter
- Length Converter
- CM to Feet and Inches
- Meters to Feet and Inches
- Feet and Inches to CM
- Fahrenheit to Celsius
- LBS to KG
- KG to LBS