Free Online Calculator Tools

Browse 6 free online calculator tools. Every tool runs entirely in your browser — no upload, no signup, no install.

All tools in this category (6)

Find percentages, ratios and percent change instantly.

Calculate exact age in years, months and days from a birth date.

Count days, weeks and working days between two dates.

Calculate tip, total and amount per person for any bill.

Estimate monthly payments, total interest and payoff plans.

Online scientific calculator with trig, logs, roots and powers.