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Free Calculator Tools Online

All Calculator Tools
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Scientific Calculator
sin, cos, tan, log, โˆš, powers, ฯ€ and e โ€” keyboard supported
FREE
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Unit Converter
Convert length, weight, temperature, area and speed
FREE
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Percentage Calculator
What is X% of Y? Percentage change and more
FREE
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Tip Calculator
Calculate tip and split the bill instantly
FREE
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Age Calculator
Exact age in years, months and days
FREE
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BMI Calculator
Body Mass Index โ€” metric and imperial units
FREE
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Loan Calculator
Monthly payment, total interest & amortization
FREE
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Discount Calculator
Sale price, savings & profit margin
FREE
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Currency Converter
Convert between 30+ world currencies
FREE
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GPA Calculator
US 4.0 scale & UK degree grade converter
FREE
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Readability Checker
Flesch-Kincaid, Gunning Fog & reading grade level
FREE
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Invoice Generator
Printable invoices with line items and tax
FREE
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Pomodoro Timer
Focus and break timer with session tracking
FREE
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Aspect Ratio Calculator
Calculate and convert image or video aspect ratios
FREE
About These Tools

From a full scientific calculator with trigonometry and logarithms to quick everyday tools like tip splitting, BMI, and loan amortization, ToolsPix calculators are designed to give you accurate answers in seconds. Every calculator runs locally in your browser โ€” there is no data collection and no account required.

The financial calculators โ€” loan, discount, percentage, and currency converter โ€” are built for practical decisions rather than academic exercises. The loan calculator, for example, produces a full month-by-month amortization schedule so you can see exactly how much interest you pay over the life of a loan at any interest rate.

The health tools (BMI calculator) and productivity tools (Pomodoro timer, invoice generator) round out a collection that covers everything from a quick bill split at a restaurant to a detailed mortgage comparison.

Frequently Asked Questions
All financial calculators use standard mathematical formulas โ€” the same ones used by banks and financial institutions. The loan calculator uses the standard amortization formula and the results match those of dedicated mortgage tools. That said, always confirm important financial decisions with a qualified professional.
Yes. You can type numbers, operators (+, -, *, /), parentheses, the caret for powers (^), and press Enter to calculate. Press Backspace to delete the last character and Escape to clear the display.
Open the Scientific Calculator and click the DEG button at the top right of the display. All trigonometric functions (sin, cos, tan and their inverses) will then operate in degrees. The default mode is DEG.
The converter covers 30+ major world currencies including USD, EUR, GBP, JPY, CNY, AUD, CAD, CHF, HKD, SGD and more. Exchange rates are bundled in the tool and reflect recent market rates.
Yes. The Invoice Generator lets you enter your business details, client information, line items with quantities and unit prices, a tax rate, and optional notes. The result is a clean, printable invoice you can save as PDF via your browser's print dialog.