Resistive voltage divider
Calculates resistors of the voltage divider network automatically. Assumes the required output current to be negligible.
| Example 1: Must calculate the resistors for a 5V to 1.25V voltage divider using 1% resistor series | View example |
You may use one of the following SI prefix after a value: p=pico, n=nano, u=micro, m=milli, k=kilo, M=mega, G=giga
| Results |
| Division ratio | ~3.333333:1 |
| Resistor R1 | Resistor R2 | Output voltage | Error % | Power loss |
| 27 kilo-ohms | 12 kilo-ohms | ~3.076923 volts | ~2.564103% | ~2.564103 milliwatts |
| 2.7 kilo-ohms | 1.2 kilo-ohms | ~3.076923 volts | ~2.564103% | ~25.641026 milliwatts |
| 15 kilo-ohms | 6.8 kilo-ohms | ~3.119266 volts | ~3.975535% | ~4.587156 milliwatts |
| 22 kilo-ohms | 10 kilo-ohms | 3.125 volts | ~4.166667% | 3.125 milliwatts |
| 2.2 kilo-ohms | 1 kilo-ohms | 3.125 volts | ~4.166667% | 31.25 milliwatts |
| 33 kilo-ohms | 15 kilo-ohms | 3.125 volts | ~4.166667% | ~2.083333 milliwatts |
| 3.3 kilo-ohms | 1.5 kilo-ohms | 3.125 volts | ~4.166667% | ~20.833333 milliwatts |
| 18 kilo-ohms | 8.2 kilo-ohms | ~3.129771 volts | ~4.3257% | ~3.816794 milliwatts |
| 82 kilo-ohms | 33 kilo-ohms | ~2.869565 volts | ~4.347826% | ~869.565217 microwatts |
| 8.2 kilo-ohms | 3.3 kilo-ohms | ~2.869565 volts | ~4.347826% | ~8.695652 milliwatts |
| 3.9 kilo-ohms | 1.8 kilo-ohms | ~3.157895 volts | ~5.263158% | ~17.54386 milliwatts |
| 39 kilo-ohms | 18 kilo-ohms | ~3.157895 volts | ~5.263158% | ~1.754386 milliwatts |
| 68 kilo-ohms | 27 kilo-ohms | ~2.842105 volts | ~5.263158% | ~1.052632 milliwatts |
| 6.8 kilo-ohms | 2.7 kilo-ohms | ~2.842105 volts | ~5.263158% | ~10.526316 milliwatts |
| 56 kilo-ohms | 22 kilo-ohms | ~2.820513 volts | ~5.982906% | ~1.282051 milliwatts |
| 5.6 kilo-ohms | 2.2 kilo-ohms | ~2.820513 volts | ~5.982906% | ~12.820513 milliwatts |
| 12 kilo-ohms | 5.6 kilo-ohms | ~3.181818 volts | ~6.060606% | ~5.681818 milliwatts |
| 12 kilo-ohms | 4.7 kilo-ohms | ~2.814371 volts | ~6.187625% | ~5.988024 milliwatts |
| 47 kilo-ohms | 22 kilo-ohms | ~3.188406 volts | ~6.280193% | ~1.449275 milliwatts |
| 4.7 kilo-ohms | 2.2 kilo-ohms | ~3.188406 volts | ~6.280193% | ~14.492754 milliwatts |
| 10 kilo-ohms | 3.9 kilo-ohms | ~2.805755 volts | ~6.47482% | ~7.194245 milliwatts |
| 100 kilo-ohms | 39 kilo-ohms | ~2.805755 volts | ~6.47482% | ~719.42446 microwatts |
| 100 kilo-ohms | 47 kilo-ohms | ~3.197279 volts | ~6.575964% | ~680.272109 microwatts |
| 10 kilo-ohms | 4.7 kilo-ohms | ~3.197279 volts | ~6.575964% | ~6.802721 milliwatts |
| 3.9 kilo-ohms | 1.5 kilo-ohms | ~2.777778 volts | ~7.407407% | ~18.518519 milliwatts |
| 39 kilo-ohms | 15 kilo-ohms | ~2.777778 volts | ~7.407407% | ~1.851852 milliwatts |
| 82 kilo-ohms | 39 kilo-ohms | ~3.22314 volts | ~7.438017% | ~826.446281 microwatts |
| 8.2 kilo-ohms | 3.9 kilo-ohms | ~3.22314 volts | ~7.438017% | ~8.264463 milliwatts |
| 47 kilo-ohms | 18 kilo-ohms | ~2.769231 volts | ~7.692308% | ~1.538462 milliwatts |
| 4.7 kilo-ohms | 1.8 kilo-ohms | ~2.769231 volts | ~7.692308% | ~15.384615 milliwatts |
| 56 kilo-ohms | 27 kilo-ohms | ~3.253012 volts | ~8.433735% | ~1.204819 milliwatts |
| 5.6 kilo-ohms | 2.7 kilo-ohms | ~3.253012 volts | ~8.433735% | ~12.048193 milliwatts |
| 18 kilo-ohms | 6.8 kilo-ohms | ~2.741935 volts | ~8.602151% | ~4.032258 milliwatts |
| 6.8 kilo-ohms | 3.3 kilo-ohms | ~3.267327 volts | ~8.910891% | ~9.90099 milliwatts |
| 68 kilo-ohms | 33 kilo-ohms | ~3.267327 volts | ~8.910891% | ~990.09901 microwatts |
| 15 kilo-ohms | 5.6 kilo-ohms | ~2.718447 volts | ~9.385113% | ~4.854369 milliwatts |
| 22 kilo-ohms | 8.2 kilo-ohms | ~2.715232 volts | ~9.492274% | ~3.311258 milliwatts |
| 27 kilo-ohms | 10 kilo-ohms | ~2.702703 volts | ~9.90991% | ~2.702703 milliwatts |
| 2.7 kilo-ohms | 1 kilo-ohms | ~2.702703 volts | ~9.90991% | ~27.027027 milliwatts |
