Ohm's Law Calculator

Pick what you need to find, enter the other two values, and the live schematic does the rest.

Tip: LED current-limiting resistors typically sit between 220Ω–1kΩ for 5–9V supplies. Use "Solve R" to calculate yours safely before breadboarding.
Resistance
— Ω
Power dissipated: —
V R I = current flow
Flow speed scales with current magnitude
Need a resistor for this build? Browse resistors & components →
Product successfully added to your Shopping Cart
Continue shopping View cart

We’re upgrading to serve you better! 🚀

Dear Customers,
Kitkraft.in is currently undergoing a major warehouse and systems upgrade to make your future shopping experience faster and smoother!

Because of this massive overhaul, we are temporarily pausing new orders and deliveries for the next couple of days.

Existing Orders: Processing may face slight delays, but we are on it!

New Orders: We will be back online and ready for you on 30th July.

We appreciate your patience while we renovate behind the scenes!