Useful

Tools

Fast calculators with clear results. Informational — not professional advice.

Find exact age in years, months, and days from a date of birth — optionally up to a chosen "as of" date.

Solve common percentage problems: what is X% of Y, what percent A is of B, and percentage change.

Estimate how a lump sum can grow with compound interest across different compounding frequencies.

Project future savings with a starting balance, regular contributions, and an assumed annual return.

Estimate monthly payments, total interest, and payoff totals for a fixed-rate installment loan.

See how purchasing power changes over time using an assumed average annual inflation rate.

Add or subtract days, weeks, and months from a date, or find the exact duration between two dates.

Convert a date and time between world time zones for calls, travel, and remote teams.