Free Online Calculators
Work out a percentage, see what compound interest does to your savings, measure the area of a room, count business days or test your microphone. Every result shows the numbers behind it, and nothing you type leaves your browser.
- Free
- No sign-up
- Runs in your browser
Someone shared this result with you. It was made with Online Calculators, free on VISU, no sign-up.
All 9 calculators and utilities
- Discount Margin CalculatorMargin after a discount or cashback, the extra sales that make up for it and the discount where the loss starts.
- Square Footage CalculatorSquare feet and square metres of a room or plot, with extra for waste and the cost at your price per unit. New
- Business Days CalculatorBusiness days between two dates, or a date plus N business days, without weekends and US federal holidays. New
- Compound Interest CalculatorWhat a starting amount and monthly deposits become at your rate, with the interest earned year by year. New
- Mic, Camera and Keyboard TestCheck your microphone level, your camera image and every key of your keyboard in the browser. Nothing is recorded. New
- Percentage Calculator and Rule of ThreeX% of a number, what percent, percent change and direct or inverse rule of three, with every step shown. New
- Concrete Slab Volume CalculatorVolume with extra (m³), Geometric volume (m³), Volume with extra (L). New
- Paint Quantity CalculatorPaint needed (L), Whole cans, Painted area (m²). New
- Volume CalculatorVolume (m³), Volume (L), Volume (cm³). New
Share your numbers with one link
A VISU Link page keeps your links, prices and contact in one place you can update any time. Free to start.
Create your VISU Link See VISU LinkHow to use it
- Pick the calculator for your question: a percentage, interest, an area, a date range or a device check.
- Type your own numbers. The result updates as you type.
- Read the step by step, then copy the result or share the link with the same numbers.
Examples
Saving every month
Type a monthly deposit and a rate into the compound interest calculator and see the balance year by year.
Buying flooring
Type the length and width of the room into the area calculator and get the square feet or square metres, with extra for cuts.
Questions
Are these calculators free?
Yes. Every calculator works without an account and without a trial.
Are my numbers saved or sent anywhere?
No. The calculators run in your browser, so what you type stays on your device unless you share a link.
Can I see how the result was calculated?
Yes. The calculators show the formula or the steps with your own numbers, so you can check them.
Is the interest result an offer from a bank?
No. It is a simulation from the rate and term you type. A bank or broker adds its own fees and taxes, so ask for the full cost before you invest.
Why is the mic and camera test here?
It is a quick utility like the others: open it, check that your microphone, camera or keyboard works, and close it. Nothing is recorded.