Solve Ohm's Law Homework

Check circuit problems by entering any two known values.

Hakuna kuingia kinachohitajika

Voltage (V)

Current (I)

Resistance (R)

Power (P)

Enter any two values and the other two are solved automatically

💡 Ohm's law: V = I × R. Power adds P = V × I. Knowing any two lets you derive the rest — handy for sizing resistors, checking LED current, or working out heat dissipation.

Students tips

🎓

The core relationships are V = I × R and P = V × I — every other formula is derived from these two.

💡

Enter the two values your problem gives you and verify your hand calculation against the result.

🎯

Watch your units: volts, amps (not milliamps), and ohms. Convert mA to A by dividing by 1000.

Jinsi Inavyofanya Kazi

Ingiza

Enter your data into the tool above. Everything stays local to your browser.

Chakata

The tool processes your data instantly in your browser using JavaScript. No server, no waiting.

Pakua

Get your result instantly. Nothing is stored after you leave the page — complete privacy.

Kwa nini utumie yetu?

✓Bure kabisa — bila gharama zilizofichwa, kamwe

✓Hakuna akaunti, barua pepe, au kuingia kinachohitajika

✓Faili hazitoki kwenye kifaa chako kamwe

✓Hakuna kikwazo cha ukubwa wa faili kabisa

✓Hakuna alama za maji kwenye matokeo yoyote

Also check out…

💡

Size a Current-Limiting Resistor for an LED

Work out the resistor value an LED needs from supp

🔥

Calculate Power Dissipation (Watts)

Find how many watts a component dissipates so you

🔋

Estimate Current Draw from a Battery

Find the current a load pulls so you can estimate

📉

Calculate Voltage Across a Component

Find the voltage drop across a resistor from curre

Maswali Yanayoulizwa Mara Kwa Mara

Back to Ohm's Law Calculator