Everyday Utilities
6 free utility tools — no sign-up required
Free everyday tools for age calculation, GPA conversion, tip splitting, unit conversion, e-commerce profit, and more.
E-Commerce Profit
Calculate margins for Amazon, Etsy, and TikTok Shop
Internet Speed Test
Test your download and upload speeds instantly
Age Calculator
Calculate exact age in years, months, and days
GPA Calculator
Convert letter grades to a 4.0 scale GPA
Tip Calculator
Split bills and calculate tip amounts per person
Unit Converter
Convert length, weight, and temperature units
About These Everyday Utilities Calculators
Use Tip for a percentage and equal bill split, GPA for credit-weighted grades, and Unit Converter for the units listed in its form. Check your school's grade scale and whether the bill entered includes tax. Small display-rounding differences can matter when collecting a total from several people.
Age compares calendar dates; legal birthday conventions can differ. E-Commerce Profit separates sale revenue, entered costs, fees and margin; platform presets are examples rather than guaranteed current rates. Internet Speed loads an external OpenSpeedTest widget only when you start it, so external connectivity and privacy practices apply.
What Makes These Tools Stand Out
Compare consistent assumptions
Change one input at a time, keep track of the units and compare both the result and the exclusions stated on each tool.
Check the worked example
Each tool includes a specific example, its calculation method and reference links. Use these to understand the result before applying it to your own situation.
Frequently Asked Questions
Where should I start?
Use Tip for a percentage and equal bill split, GPA for credit-weighted grades, and Unit Converter for the units listed in its form. Check your school's grade scale and whether the bill entered includes tax. Small display-rounding differences can matter when collecting a total from several people.
Can I rely on the result for an important decision?
Results depend on your inputs and the model's limitations. They are not financial advice, not medical advice and not legal advice or tax advice. Verify consequential results with an appropriate professional.
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