Calculator category
Conversion Calculators
Convert length, weight, temperature, volume, area, time, data, speed, and kitchen units with fast calculators, visible formulas, examples, and rounding notes.
Best starting points
Guides and comparisons
Use these explanations when you need the decision context behind a calculator, not just the final number.
Metric vs Imperial Units
Metric and imperial units measure the same real-world quantities with different systems. Conversions are useful when measurements, products, recipes, travel speeds, or weather reports use the system you do not normally use.
Fahrenheit vs Celsius
Fahrenheit and Celsius are two temperature scales with different zero points and different degree sizes. Comparing them is easiest with common benchmarks and the correct conversion formulas.
Cups to mL Conversion Guide
Cups to milliliters conversion is most useful for recipes that mix U.S. kitchen measurements with metric measuring tools. Calculastic uses the U.S. customary cup assumption: 1 cup = 236.5882365 ml.
MB vs GB vs TB
MB, GB, and TB are data-size units used for files, downloads, apps, phones, computers, drives, and cloud storage. Understanding their relationship makes storage limits easier to compare.
How Data Storage Conversions Work
Data storage conversions move file sizes up or down between KB, MB, GB, and TB. The practical challenge is that software and storage vendors do not always display units with the same convention.
mph vs km/h
mph and km/h both measure speed as distance per hour. The difference is the distance unit: miles per hour uses miles, while kilometers per hour uses kilometers.
Length conversions
Convert everyday length measurements between imperial and metric units.
Inches to CM Calculator
Convert inches to centimeters with the exact 2.54 cm per inch factor.
Open inches to cm calculatorCM to Inches Calculator
Convert centimeters to inches by dividing centimeters by 2.54.
Open cm to inches calculatorFeet to Meters Calculator
Convert feet to meters using the exact 0.3048 meter per foot factor.
Open feet to meters calculatorMeters to Feet Calculator
Convert meters to feet by dividing meters by 0.3048.
Open meters to feet calculatorWeight conversions
Convert pounds and kilograms for body weight, shipping, luggage, and product weights.
Temperature conversions
Convert Fahrenheit and Celsius for weather, cooking, appliances, and science references.
Volume conversions
Convert U.S. liquid gallons and liters for fuel, containers, liquids, and product volumes.
Area conversions
Convert square feet and square meters for rooms, real estate, floor plans, and projects.
Square Feet to Square Meters Calculator
Convert square feet to square meters using 0.09290304 square meters per square foot.
Open square feet to square meters calculatorSquare Meters to Square Feet Calculator
Convert square meters to square feet using 10.7639104167 square feet per square meter.
Open square meters to square feet calculatorTime conversions
Convert minutes, hours, days, and weeks for work logs, schedules, deadlines, and planning.
Minutes to Hours Calculator
Convert minutes to hours by dividing minutes by 60.
Open minutes to hours calculatorHours to Minutes Calculator
Convert hours to minutes by multiplying hours by 60.
Open hours to minutes calculatorDays to Weeks Calculator
Convert days to weeks by dividing days by 7.
Open days to weeks calculatorWeeks to Days Calculator
Convert weeks to days by multiplying weeks by 7.
Open weeks to days calculatorData storage conversions
Convert KB, MB, GB, and TB for file sizes, downloads, storage plans, and device capacity.
KB to MB Calculator
Convert kilobytes to megabytes using 1 MB = 1,024 KB.
Open kb to mb calculatorMB to GB Calculator
Convert megabytes to gigabytes using 1 GB = 1,024 MB.
Open mb to gb calculatorGB to MB Calculator
Convert gigabytes to megabytes using 1 GB = 1,024 MB.
Open gb to mb calculatorTB to GB Calculator
Convert terabytes to gigabytes using 1 TB = 1,024 GB.
Open tb to gb calculatorSpeed conversions
Convert miles per hour and kilometers per hour for driving, travel, cycling, and road speeds.
Cooking and measurement conversions
Convert U.S. cups and milliliters for recipes, baking, meal prep, and kitchen measurement.
Common tasks
Related categories
Move between calculator families when the next question depends on a different type of input.
Frequently Asked Questions
Which conversion calculator should I start with?
Start with the unit you already have. Use the reverse calculator when the input is in the other unit, such as centimeters to inches instead of inches to centimeters.
Are reverse conversion pages duplicate calculators?
No. Reverse conversions serve different input intent and use the inverse formula, with examples and notes written for the unit users start with.
How precise are these conversion calculators?
The calculators use standard conversion factors, then display rounded results. Keep more decimal places when a specification, shipment, or project requires tighter precision.