Tons to BTU Calculator: Convert Cooling Capacity Instantly (Free Tool) You are buying an air conditioner. The specification says “3 tons.” But your friend’s AC is rated in BTUs. Which one is more powerful? A “ton” in HVAC does not mean weight. It is a unit of cooling capacity. One … Read more
Power Factor Calculator: Improve Electrical Efficiency (Free Tool) Your electric bill is higher than expected. Your motors run hot. Your lights flicker. The problem might be low power factor. Power factor measures how efficiently your electrical system uses power. A low power factor wastes energy. It strains equipment. It increases … Read more
kW to HP Calculator: Convert Kilowatts to Horsepower (Free Tool) You are looking at an electric motor. The nameplate says 15 kW. But you think in horsepower. How much is that? Or you are reading a car specification. It says 300 horsepower. You want to know the kilowatts. Kilowatts and … Read more
Wire / Cable Size Calculator: Find the Right Gauge for Your Circuit (Free Tool) You are installing a new circuit. You know the amperage. You know the length. But what size wire do you need? Choosing the wrong wire size is dangerous. Too small, and the wire overheats. Too large, … Read more
3-Phase Power Calculator: Calculate Three-Phase Electrical Power (Free Tool) You are working with industrial equipment. A motor runs on three-phase power. You need to know how much power it consumes. Single-phase power is simple. Three-phase is different. It uses a different formula. You need to account for line voltage and … Read more
Amps to Watts Calculator: Convert Electrical Current to Power (Free Tool) You have a device that draws 10 amps. You want to know how many watts it uses. Maybe you are sizing a generator. Maybe you are checking your electric bill. Maybe you are installing a new circuit. Amps and … Read more
Voltage Drop Calculator: Prevent Power Loss in Your Circuits (Free Tool) You run a long wire from your power source to your device. At the source, you have 120 volts. At the device, you measure only 110 volts. You lost 10 volts along the wire. That is voltage drop. Voltage … Read more
Ohm’s Law Calculator 2025 — Voltage, Current, Resistance & Power | Free Tool ⚡ Electrical Engineering Tool Ohm’s LawCalculator Calculate Voltage, Current, Resistance, or Power in one click. Built-in formula guide, animated circuit, and all unit conversions included. V = I × R P = V × I I = … Read more
Refrigerant Charge Calculator: Find the Perfect Refrigerant Level (Free Tool) Refrigerant Charge Calculator Calculate the correct refrigerant amount for your system. Fill in your equipment details below. Get precise results. Line Set Length (ft) Line Set Size Select size3/8″ liquid line1/4″ liquid line1/2″ liquid line Unit Capacity (tons) Refrigerant Type … Read more
Inches to Centimeters Converter: Convert Length Instantly (Free Tool) Inches to Centimeters Converter | Easy & Accurate Calculator 📏 Inches to Centimeters Converter: The Complete Guide (2026) Fast, accurate, and easy. Convert inches to cm in one click. Learn the formula, see real examples, and understand why this matters for … Read more
