Online calculators

Calculate percentages, dates, margins and fixed-rate loan payments. Results depend on the values you enter; verify estimates before making decisions.

Loan CalculatorEstimate monthly payments on a fixed-rate loan. Runs locally in your browser, without an account.Age CalculatorCalculate age from date of birth. Runs locally in your browser, without an account.Hijri Date ConverterConvert Hijri to Gregorian and back with the Umm al-Qura calendar. Runs in your browser.IBAN ValidatorCheck an IBAN’s length and check digits before a transfer. Runs in your browser.Date Difference CalculatorCalculate days between two dates. Runs locally in your browser, without an account.VAT CalculatorCalculate VAT amount and total price. Runs locally in your browser, without an account.Profit Margin CalculatorCalculate profit and gross margin. Runs locally in your browser, without an account.Percentage Change CalculatorCalculate percentage change between two values. Runs locally in your browser, without an account.Percentage CalculatorCalculate a percentage of a number. Runs locally in your browser, without an account.

Choose the right workflow

Each tool explains its accepted input, output and limitations. Start with a small example, inspect the result and keep your original files. Files and entered text are processed by the tool in your browser.

Usage and troubleshooting · Data practices · Browse all categories

Business and everyday calculators

Pick the tool that matches your task:

Pricing and tax: the VAT calculator has presets for Saudi Arabia 15%, UAE 5%, Bahrain 10% and Oman 5%. Use the profit margin calculator to see profit and margin from cost and sale price.
Percentages: percentage of a number and percent increase or decrease.
Loans and dates: loan payment calculator, age calculator and days between dates.

Every tool on ToolTama is free, needs no signup and processes your input in your browser. See the full tools directory.

Frequently asked questions

Are the results financial or tax advice?

No. They are estimates for planning. Check tax rules with your tax authority or accountant.

Can I calculate VAT from a price that already includes it?

Yes. Tick the includes-VAT option in the VAT calculator to get the net amount and the VAT inside the total.

How does the loan calculator work?

It uses the standard amortizing formula to estimate a fixed monthly payment and total interest.

Are my numbers saved?

No. Calculations run in your browser and nothing is sent to ToolTama.

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