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Free online calculators
Free online tools
Calculators and generators for everyday tasks.
Browse calculators for finance, health, and everyday life — or use our generators to create passwords, tokens, UUIDs, and more. Pick a tool and get an instant result — no sign-up required.
45+ calculators · 18 generators
Most popular calculators
The tools people use most often. Jump straight in or explore the full directory.
Percentage Calculator
Calculate a percentage of any value or test increase and decrease scenarios.
Age Calculator
Measure age between two dates with a clean, readable breakdown.
Discount Calculator
Estimate reduced price, savings, and tax impact in one panel.
BMI Calculator
Estimate body mass index from weight and height inputs.
Loan Calculator
Estimate monthly repayments, total payment, and interest paid.
Compound Interest Calculator
Forecast compounded growth with optional monthly contributions.
Popular generators
All computations run entirely in your browser using cryptographically secure algorithms — instant results, no server round-trip.
Password Generator
Generate strong, unique passwords with custom length and character sets.
Token Generator
Generate secure API tokens, keys, and random secrets in hex or base64 format.
UUID Generator
Generate v4 UUIDs for databases, APIs, and distributed systems.
Lorem Ipsum Generator
Generate lorem ipsum placeholder text for designs and prototypes.
Slug Generator
Convert titles and phrases into clean, SEO-friendly URL slugs.
Random Number Generator
Generate random integers in any range, with optional unique values.
How it works
Three steps to your answer — it takes less than a minute.
Fill in the form
Enter a few values or pick options — most tools only need two or three inputs.
Get your answer
See your result instantly, with a clear breakdown or output you can act on right away.
What people use us for
Real scenarios where a quick calculation saves time and guesswork.
Personal finance
Figure out loan payments, savings timelines, mortgage costs, and discount prices without a spreadsheet.
Health & fitness
Check your BMI, estimate daily calories, or calculate body fat percentage in under a minute.
Planning & travel
Count workdays between dates, estimate fuel costs for a trip, or convert currencies before you go.
Secure credentials
Generate strong passwords, API tokens, and UUIDs for your accounts and apps — all computed locally in your browser.
Development & testing
Create random identifiers, fake content, and URL slugs to seed databases, fill mockups, or test edge cases.
Content & writing
Generate lorem ipsum placeholder text for layouts, or produce clean URL slugs from titles in one click.
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