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Other calculators

Everyday tools that don't fit neatly anywhere else.

Age calculator

Find exact age in years, months, and days.

Date calculator

Find the difference between dates, or add/subtract days.

Time calculator

Add or subtract hours, minutes, and seconds.

Hours calculator

Calculate total hours worked between two times.

GPA calculator

Calculate your grade point average.

Grade calculator

Combine weighted categories into your overall grade.

Concrete calculator

Estimate concrete volume needed for a project.

Subnet calculator

Calculate subnet ranges for an IP address.

Password generator

Generate a strong, random password.

Conversion calculator

Convert between common units of measurement.

Tip calculator

Calculate a tip and split the bill.

Random number picker

Pick a random number or item from a list.

Sleep calculator

Find the best bedtime or wake-up time based on sleep cycles.

All 13 other calculators are live — try any of them above.