body { font-family: system-ui, sans-serif; background: #f8fafc; display: flex; align-items: center; justify-content: center; min-height: 100vh; margin: 0; } .noscript-box { max-width: 480px; padding: 2rem; background: #fff; border-radius: 16px; border: 1px solid #e2e8f0; text-align: center; } h1 { font-size: 1.5rem; color: #0f172a; margin: 0 0 0.5rem; } p { color: #475569; line-height: 1.6; margin: 0 0 1rem; } a { color: #1e40af; font-weight: 600; }

JavaScript required

United Calculator uses JavaScript to run its interactive calculators, formula engines, and search. Please enable JavaScript in your browser settings and refresh the page.

How to enable JavaScript →

Everyday Life Calculators

Quick calculators for dates, time, tips, discounts, travel, fuel, recipes, shopping, and household planning.

Discount Calculator
Fuel Cost Calculator
Date Difference Calculator
Time Duration Calculator
Travel Time Calculator
Age Calculator
Savings Challenge Calculator
Hourly Wage Calculator
Overtime Calculator
Holiday Pay Calculator
Sick Pay Calculator
Childcare Cost Calculator
School Fees Calculator
Meal Cost Calculator
Recipe Cost Calculator
Lunch Cost Calculator
Takeaway Cost Calculator
Hangover Calculator
Smoking Cost Calculator
Vaping Cost Calculator
Laundry Cost Calculator
Dry Cleaning Calculator
Ironing Time Calculator
Dishwasher vs Handwash Calculator