UtilGrid: Free Online Calculators, Generators and Converters
Use fast, free online tools for finance, tax, health, fitness, productivity and developer work. Calculate, generate and convert common values instantly on desktop or mobile.
Receipt Generator
Create professional receipts online for free
UUID Generator
Generate unique IDs for apps and databases
Calorie Calculator
Calculate daily calorie needs and TDEE
Protein Calculator
Find daily protein requirements
Water Intake Calculator
Calculate daily hydration needs
Tax Calculator
Estimate tax by country and income
GST Calculator
Calculate Goods & Services Tax
VAT Calculator
Calculate Value Added Tax
Loan Calculator
Calculate loan payments and interest
Mortgage Calculator
Calculate mortgage payments and costs
Percentage Calculator
Calculate percentages, changes, and ratios
Discount Calculator
Find sale price, savings, and tax after discount
Sales Tax Calculator
Add tax to a price or remove included tax
Fraction to Percentage
Convert fractions to percentages and decimals
Why Choose UtilGrid?
Instant Results
Get calculations instantly without any delays or page refreshes.
Mobile Friendly
Works smoothly on smartphones, tablets, laptops and desktops.
100% Free
No registration required. All tools are completely free to use.
Choose the right calculator
Use the percentage calculator for general percent questions, the discount calculator for sale prices, and the sales tax calculator when you need to add or remove tax. Each page explains its formula, gives a worked example, and lists important limitations.
Built for verification
More than a result box
Each calculator explains its formula, includes a worked example, states important limitations, and links to our testing method. Inputs stay in your browser unless a tool clearly says otherwise.
Transparent calculations: formulas and rounding behavior are visible beside the tool.
Clear caveats: tax, finance, and health estimates explain when professional guidance is appropriate.
Corrections welcomed: readers can report an error with the inputs and expected result for reproduction.
Read the editorial and correction policyFrequently Asked Questions
Are these calculators accurate?
Yes, the calculators use standard formulas and are tested for typical use cases. They provide estimates and should not replace professional advice.
Do you store my data?
No account is required. Tool inputs are processed in your browser where possible, and we do not sell personal calculator inputs.
Are the tools really free?
Yes. UtilGrid is free to use and may be supported by advertising.
Can I use these tools on mobile?
Yes. Every calculator, generator and converter-style utility is designed to work on modern mobile browsers.