Calculators
Percentage, tip, unit, age, salary, and pace calculators — free in your browser.
Browse every free calculators on FileToolsHub. Open a tool to upload or paste your input, run the action, and download or copy the result — no installation and no paid plan required for everyday use.
10 free online tools
Free online calculators
FileToolsHub calculators run entirely in your browser — percentage, tip, discount, unit conversion, number bases, date difference, age, salary, and running pace. No accounts and no uploads.
These tools use standard formulas only. Salary conversion is for gross amounts and does not estimate tax. Results are for everyday planning, not professional financial or medical advice.
- Split a restaurant bill with tip
- Convert km to miles or kg to lb
- Find percent change between two numbers
- Convert binary or hex values
- Calculate age from a date of birth
- Estimate hourly vs yearly pay (gross)
- Calculate weighted GPA on a 4.0 or 5.0 scale
All calculators
Age Calculator
Calculate age in years, months, and days from a date of birth.
Date Difference
Calculate the number of days, weeks, and hours between two dates.
Discount Calculator
Calculate sale price and savings from an original price and discount percent.
GPA Calculator
Calculate weighted GPA from course grades and credits on a 4.0, 5.0, or percentage scale.
Number Base Converter
Convert numbers between binary, octal, decimal, and hexadecimal.
Pace Calculator
Calculate running or walking pace, speed, and finish time from distance and time.
Percentage Calculator
Find X% of Y, what percent one number is of another, or percent change.
Salary Converter
Convert between hourly, daily, weekly, monthly, and yearly pay.
Tip Calculator
Calculate tip amount and split a bill between people.
Unit Converter
Convert length, weight, and temperature between common units.
Looking for something else? Browse the full sitemap.
Why use FileToolsHub for calculators?
FileToolsHub keeps calculators in one place so you do not bounce between unrelated converter sites. Each tool page explains how the workflow works, lists benefits, and answers common questions so you can finish the job without searching for instructions.
When you need a different format or a follow-up step, related tools and category links make it easy to continue — for example merge then compress, or format JSON then validate. Browse the sitemap if you want a full alphabetical-style list by category.
Every tool in this category is free for unlimited everyday use. Prefer mobile? The same pages work in phone and tablet browsers so you can convert a file or format text when you are away from your desktop.