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Easy Volts to Horsepower Calculator. Convert volts to HP with simple formulas. Works for DC, AC, 12V, 115V, and 240V systems. Fast, clear, and accurate.
A motor needs power to run. We see this power in two ways. One is volts. The other is horsepower. Many people get confused when they try to link these two values. So we built a simple and fast Volts to Horsepower Calculator. It helps you find the true horsepower from any voltage input. The tool is easy to use. It works with DC, single-phase AC, and three-phase AC systems.
This guide explains the formula, the steps, and how you can use the calculator in real life. The tone is friendly, clear, and simple to read.
A volts to horsepower calculator helps you turn electric power into mechanical power. In short, it shows how many HP a device can deliver when you know the volts, amps, power factor, and efficiency. Many people use it for motors, inverters, battery systems, and small tools like a 12-volt motor.
The main idea is simple. Volts and amps give you watts. Watts, with efficiency, give you horsepower.
There is no fixed number of volts for 1 HP. That’s because horsepower depends on volts, amps, power factor, and efficiency. One motor at 12 volts may need high amps. Another motor at 240 volts may need fewer amps. So you must use the formula.
But one thing is fixed.
1 HP = 745.699872 watts.
The steps are short and simple. First, find the watts. Then multiply by efficiency. Then divide the result by 745.699872. And boom — you get horsepower.
Here are the formulas in simple text format:
DC Formula
HP = (V × I × η) / 745.699872
Single-Phase AC Formula
HP = (V × I × PF × η) / 745.699872
Three-Phase AC Formula
HP = (√3 × V × I × PF × η) / 745.699872
Where:
There is no fixed answer. You need amps, power factor, and efficiency. A motor at 115 volts and 10 amps with a PF of 0.85 and efficiency of 0.9 gives:
HP = (115 × 10 × 0.85 × 0.9) / 745.699872
HP ≈ 1.18 HP
This is only an example. Your real result may change based on your system.
Again, you must know the amps. Here is one sample:
Motor at 240 volts, 10 amps, PF 0.9, efficiency 0.9:
HP = (240 × 10 × 0.9 × 0.9) / 745.699872
HP ≈ 2.6 HP
Higher volts often give better efficiency. But horsepower depends on the full formula.
Many users need HP from a 12-volt motor. This is common in car fans, pumps, RC motors, small tools, and solar devices.
Example:
Motor at 12 volts, 30 amps, efficiency 0.85:
HP = (12 × 30 × 0.85) / 745.699872
HP ≈ 0.41 HP
This shows why 12-volt motors need high amps to reach even 1 HP.
Our tool keeps things simple. You can use it in a few steps.
Enter your voltage. Add the current. Pick the circuit type. Add efficiency. Enter power factor for AC. Then press the calculate button. You’ll see horsepower, watts, and each step of the math. Anyone can use it. No expert skills needed.
It’s fast. It’s clear. It’s built for daily users. You can test DC motors, home tools, solar gear, and shop machines.
It gives clear results. It works for all systems. It shows the full steps of the math. It supports motors of any size. It gives instant and accurate HP numbers. Many online tools guess values. Ours shows the real equations behind the scenes.
The link between volts and horsepower can feel tricky. But it should not be. Our Volts to Horsepower Calculator gives clean answers in seconds. The math stays simple. The words stay light. You can check 12-volt motors, 115-volt motors, 240-volt motors, AC or DC. One tool. One clean result. Try it once and you’ll see how easy it is.
It’s a way to turn electric power into mechanical power.
No. It depends on amps, PF, and efficiency.
No. You must also know amps.
Yes, but only with very high amps.
No. Watts are electric. Horsepower is mechanical.
1 HP = 745.699872 watts.