How we worked it out
Updated as you change the numbers.
- Vout = Vin × R2 ÷ (R1 + R2). R2 = Vout × R1 ÷ (Vin − Vout).
Method and assumptions
A load connected to the output draws current and pulls Vout down unless it has much higher resistance than R2. Dividers suit signal levels, not power supplies.
Questions
What does a 10 kΩ / 4.7 kΩ divider give from 12 V?
3.84 V.
Sources
Method and figures checked on . Every worked answer on this page is covered by an automated test. Found a mistake? Tell us.