Calculate percentages, increases, and differences.
25% of 100
25.00
25 is what % of 100?
25.00%
100 is 25% of what?
400.00
Keep going
Convert between various units
Convert Unix timestamps to dates
Calculate date differences
Calculate exact age from birthdate
Generate random numbers
Perform binary calculations
Format numbers for different locales
Check if numbers are prime
Have feedback or found an issue?
Help us improve this tool