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Everyday Calculators
Tips, cooking times, gas mileage, pet ages, electricity costs, and 45+ practical daily tools.
53 free calculators · No signup required
What Are Everyday Calculators?
This collection of everyday calculators covers the practical math you encounter in daily life — from splitting bills and comparing unit prices to estimating screen time and planning budgets. Each tool is designed to be fast, simple, and immediately useful.
The calculators you actually reach for in daily life. Split a dinner bill, figure out cooking time for a turkey, check your gas mileage, estimate your electricity bill, or find out how old your dog really is in human years. Practical, fast, and always free.
Frequently Asked Questions
How do I calculate a tip?
For a standard 20% tip, multiply the bill by 0.20. For quick mental math: find 10% (move the decimal), then double it. On a $85 bill: 10% = $8.50, doubled = $17.00 tip. Our Tip Calculator handles splitting among groups too.
How long do I cook a turkey per pound?
Unstuffed turkey at 325°F: about 13 minutes per pound. A 15-lb turkey takes roughly 3.25 hours. Stuffed turkeys take about 15 minutes per pound. Always verify with a meat thermometer — the thigh should reach 165°F.
How do I calculate my electricity bill?
Watts × hours used per day × days per month ÷ 1,000 × your rate per kWh. A 100W device running 8 hours daily for 30 days at $0.12/kWh costs about $2.88. Our Electricity Bill Calculator does this for multiple devices.