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Math calculators

The Math line has five free calculators for everyday and school maths: a basic calculator, a scientific calculator with trigonometry and logarithms, a percentage calculator for discounts and changes, a circle calculator for circumference and area, and a date calculator that counts days between dates. Each one updates as you type and runs in your browser.

5 tools on the Math line

Which calculator do I need?

  • Basic Calculator

    Everyday sums, shopping and bills. Type on your keyboard or tap the keypad. Percent works like a phone calculator, so 200 + 15% gives 230.

  • Scientific Calculator

    Physics, chemistry and engineering coursework: sine, cosine and tangent in degrees or radians, natural and base-10 logs, powers, roots and factorials.

  • Percentage Calculator

    Discounts, tips, price rises and grade changes: X% of Y, what percent one number is of another, and the percent change between two values.

  • Circumference Calculator

    Geometry homework, garden beds and round tables: circumference, diameter and area of a circle in centimetres, metres, inches or feet.

  • Date Calculator

    Deadlines, notice periods and project plans: days, weeks and weekdays between two dates, or the date a given number of days away.

Questions about math tools

Are these calculators suitable for school and university work?

Yes. The scientific calculator covers the functions used in most secondary and first-year university courses: trigonometry in degrees or radians, logarithms, powers, roots and factorials. Results use standard double-precision arithmetic, which is accurate to about 15 significant digits, more than any coursework needs.

Can I type on my keyboard instead of clicking the keys?

Yes. Click the calculator once, then type numbers and operators directly. Enter or the equals sign gives the result, Backspace deletes the last character and Delete clears everything, so you can work through a column of figures without touching the mouse.

Do the calculators work offline?

Once a page has loaded, every calculation runs locally in your browser, so a dropped connection does not stop the calculator you have open. Nothing you type is sent to a server or stored after you close the page.

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