Tools in This Collection
Unit Converter
Convert length, weight, volume, temperature, and area between metric and imperial
Square Footage Calculator
Calculate room and yard area from dimensions in feet, inches, or meters
Aspect Ratio Calculator
Calculate screen dimensions and video resolutions from aspect ratios
Monitor Size Calculator
Verify actual screen dimensions from diagonal measurement and aspect ratio
Fuel Economy Converter
Convert between MPG, L/100km, and km/L
Watts to Amps Calculator
Calculate amperage from wattage and voltage for AC or DC circuits
AWG to mm Converter
Convert American Wire Gauge to metric diameter for international projects
Your Unit Conversion Workflow
Unit conversion comes up constantly — a European recipe in grams when you only have measuring cups, a UK appliance rating in watts when you need to know the amperage for your circuit, or wire sizing in AWG when you need the metric diameter for an international project. These tools cover the full range of everyday measurement conversions in one place.
Start with the Unit Converter for general-purpose conversion across length, weight, volume, temperature, and area. For room or flooring measurements, the Square Footage Calculator converts dimensions (feet, inches, meters) to total area — enter length × width and get square footage or square meters. The Aspect Ratio Calculator handles screen dimensions, video resolutions, and display proportions.
For electrical work, the math follows Ohm's Law: Amps = Watts / Volts. A 1500W space heater on a 120V circuit draws 12.5A. A 2400W hair dryer on 120V draws 20A — right at the circuit breaker limit. The Watts to Amps Calculator handles both AC single-phase and three-phase calculations. For wire gauge, the AWG to mm Converter translates American Wire Gauge to metric diameter — AWG 12 (household wiring) = 2.05mm, AWG 10 = 2.59mm. International specifications use mm, so this converter is essential for sourcing wire across borders.
The Monitor Size Calculator verifies actual screen dimensions from diagonal measurements and aspect ratios — a 27-inch 16:9 monitor has a 23.5-inch wide display, not 27 inches wide. The Fuel Economy Converter switches between MPG, L/100km, and km/L for comparing vehicle specs across countries.
Frequently Asked Questions
How do I convert watts to amps?
Divide watts by volts: Amps = Watts / Volts. For a 1500W heater on a 120V circuit, that's 1500 / 120 = 12.5A. For 240V circuits, divide by 240. The Watts to Amps Calculator handles both AC single-phase and three-phase calculations automatically.
What AWG wire is standard for household circuits?
AWG 12 (2.05mm diameter) is standard for 20A circuits. AWG 14 (1.63mm) is used for 15A circuits. AWG 10 (2.59mm) handles 30A circuits like dryer outlets. Lower AWG numbers mean thicker wire — AWG 6 (4.11mm) handles up to 55A.
How do I convert between metric and imperial for cooking?
The Unit Converter handles weight (grams to ounces, kg to lbs) and volume (milliliters to fluid ounces, liters to cups). For ingredient-specific conversions (flour, sugar, butter), the Cooking Converter in the Food & Cooking category is more accurate since it accounts for density differences by ingredient.