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Watts to Amps Calculator
Convert watts to amps using voltage, for DC, single-phase AC, or three-phase AC systems.
About This Calculator
Calculates electrical current (amps) from power (watts) and voltage, with support for DC, single-phase AC, and three-phase AC systems including power factor.
About This Calculator
Calculates electrical current (amps) from power (watts) and voltage, with support for DC, single-phase AC, and three-phase AC systems including power factor.
Frequently Asked Questions
How do I convert watts to amps?
For DC or single-phase AC at unity power factor: Amps = Watts ÷ Voltage. For AC with a power factor below 1, Amps = Watts ÷ (Voltage × Power Factor).
How is three-phase amps calculated from watts?
For a balanced three-phase system: Amps = Watts ÷ (√3 × Voltage × Power Factor), where √3 ≈ 1.732.
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Quick Facts
✓ 100% Free — no sign-up
✓ Works on mobile & desktop
✓ Instant results
✓ No data stored or shared
✓ Updated for 2026