Choose a Calculator
Age Calculator
Your exact age in years, months, days, hours, and minutes.
Date Difference
Days between any two dates, business days excluded option.
Time Zone Converter
Find the local time anywhere in the world.
Length Converter
Meters, feet, miles, inches, yards, kilometers — all units.
Temperature
Celsius, Fahrenheit, Kelvin — all conversions instantly.
Fuel Economy
MPG ↔ L/100km, trip cost, and full tank range.
Cooking Converter
Cups, tablespoons, grams, ounces — recipe units made easy.
Electricity Bill
Cost of running any appliance by the hour, day, or year.
Paper & Printing
Sheets needed, ink cost, total printing cost for any job.
Countdown Timer
Days, hours, minutes until any future date or event.
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AdSense 728×90Age Calculator
Your exact age in years, months, days, hours, and minutes.
Fun age facts
The average human lifespan is about 79 years (≈ 28,835 days). Every year you live ~365.25 days, which is why we have leap years.
Your heart will beat about 2.5 billion times in a lifetime. You spend about a third of your life sleeping, two-thirds awake.
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AdSense 300×250Date Difference Calculator
Calculate days, weeks, months, or business days between any two dates.
Note on business days
Business days exclude Saturdays and Sundays but NOT national holidays. For exact payroll or contract calculations, subtract your country's public holidays separately (typically 8-12 days/year in the US).
Time Zone Converter
Find the time in any city, anywhere in the world.
About time zones and DST
This calculator uses fixed UTC offsets. It does NOT account for Daylight Saving Time (DST) shifts. For exact times during DST periods (March-November in most northern countries), add or subtract 1 hour from listed standard times.
India, China, Japan, and most Asian countries do not observe DST.
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AdSense 300×250Length Converter
Convert between all major length units instantly.
Common length conversions to remember
- 1 inch = 2.54 cm exactly (international standard since 1959)
- 1 foot = 12 inches = 30.48 cm
- 1 yard = 3 feet = 0.9144 m
- 1 mile = 1.60934 km
- 1 nautical mile = 1.852 km (1 minute of latitude)
Temperature Converter
Celsius, Fahrenheit, and Kelvin — all conversions at once.
Temperature reference points
- Absolute zero: -273.15°C = -459.67°F = 0 K
- Water freezes: 0°C = 32°F = 273.15 K
- Room temperature: 20-22°C = 68-72°F
- Body temperature: 37°C = 98.6°F
- Water boils: 100°C = 212°F = 373.15 K (at sea level)
Quick mental math: °F ≈ (°C × 2) + 30. Example: 25°C ≈ 80°F (actual: 77°F).
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AdSense 300×250Fuel Economy Calculator
MPG ↔ L/100km, trip cost, and full tank range.
Fuel efficiency by vehicle type
- Compact car: 5-7 L/100km / 35-45 MPG
- Sedan: 7-9 L/100km / 28-35 MPG
- SUV: 9-12 L/100km / 20-28 MPG
- Pickup truck: 11-15 L/100km / 16-22 MPG
- Hybrid: 4-6 L/100km / 40-55 MPG
- Electric: N/A (measured in kWh/100km)
Cooking Measurement Converter
Convert recipe units — cups, tablespoons, grams, ounces.
Why different ingredients have different weights
1 cup is 240 ml regardless of what's in it. But the WEIGHT varies because of density. A cup of flour weighs ~120g; a cup of honey weighs ~340g. This is why baking recipes from professionals use weights (grams) instead of volumes — it's much more accurate.
For consistent baking, especially bread and pastry, weigh ingredients with a kitchen scale.
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AdSense 300×250Electricity Bill Calculator
Real cost of running any appliance.
Average electricity rates by region (2026 estimates)
- US average: $0.15/kWh
- US (Hawaii): $0.42/kWh (highest)
- US (Washington): $0.11/kWh (lowest)
- UK: £0.27/kWh (~$0.34)
- Germany: €0.40/kWh (~$0.43)
- China: ¥0.55/kWh (~$0.08)
- India: ₹6/kWh (~$0.07)
CO₂ estimate uses 0.5 kg CO₂ per kWh (global grid average). Renewable-heavy grids are much lower; coal-heavy grids higher.
Paper & Printing Cost Calculator
Total cost of a print job — paper, ink, and time.
Save money on printing
- Use duplex (double-sided) printing — cuts paper cost in half
- Use draft mode for internal documents — saves 30-50% ink
- Use refilled cartridges or third-party ink — saves 40-70%
- For large jobs (1000+ pages), local print shops often beat home printer cost
- For occasional photo printing, online services beat home photo printing
Countdown Timer
Days, hours, minutes until any future date or event.
Common upcoming events
Set a countdown for any future date and watch it update live every second.
- Birthdays, anniversaries, holidays
- Wedding day, baby due dates
- Vacation departure, exam dates
- Product launches, project deadlines
- Retirement, graduation
More Free Calculators
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