How Many Amps Does a Dryer Use? Electric, Gas and the 30 Amp Circuit
By Seamless Home Team, Home services operations · September 28, 2026
Quick answer
A full-size electric dryer typically draws roughly 20 to 25 amps at 240 volts while its heating element is on — the element alone is commonly around 5,000 to 5,600 watts — and far less during the cool-down and tumble portions of a cycle, when only the motor runs. A gas dryer burns gas for heat and uses electricity only for the motor, controls and igniter, so it typically draws a few amps at 120 volts and plugs into an ordinary receptacle on the laundry room's 20-amp circuit. The exact rating is on the dryer's label, usually inside the door. Most full-size electric dryers' installation instructions call for a 30-amp, 240-volt circuit, and NEC 110.3(B) makes those instructions binding. New installations use a four-wire receptacle (NEMA 14-30), because NEC 250.140 permits the old three-wire hookup only on existing branch circuits. On a 208-volt apartment supply, a dryer's 240-volt element delivers about 75 percent of its rated heat, so drying takes longer.
Two dryers can sit side by side in a showroom, look identical and draw currents five times apart. The difference is where the heat comes from. An electric dryer makes its heat with a resistive element on 240 volts; a gas dryer burns gas and uses electricity only to turn the drum. That single difference decides the amps, the circuit and the receptacle.
The short version
| Electric dryer | Gas dryer | |
|---|---|---|
| Supply | 240 V (120/240 V) | 120 V |
| Draw with the heat on | roughly 20–25 A | a few amps |
| Heat source | electric element, commonly ~5,000–5,600 W | gas burner |
| Typical circuit | 30 A, 240 V, per the installation instructions | the 20 A laundry circuit |
| Receptacle | NEMA 14-30 (four-wire) on new work | ordinary 120 V receptacle |
The ranges are typical of full-size models, not a specification. Compact and heat-pump dryers can be very different — some run on 120 volts — and the rating label on the dryer is the only figure that describes it.
Why an electric dryer draws what it does
Nearly all of an electric dryer's current goes to the heating element. An element of about 5,400 watts at 240 volts draws:
- 5,400 W ÷ 240 V = 22.5 A
The drum motor, controls and drum light add a few amps. They run at 120 volts, between one hot leg and the neutral, which is why a dryer circuit needs a neutral at all: the element uses both hot legs, and the motor uses one of them. That split is covered in single-phase vs three-phase power at home.
The draw is not constant
The element does not stay on for the whole cycle. A thermostat switches it on and off to hold the exhaust temperature, and most cycles end with a cool-down tumble with no heat at all. So through a load, the current moves between roughly the full figure and just the motor's few amps. A clamp meter on one hot conductor shows it switching.
The rating label
The label — usually inside the door opening or on the back panel — states the voltage and a rated current or wattage. That is a maximum, and it is the figure for the circuit, not for energy use.
What circuit an electric dryer needs
Most full-size electric dryers' installation instructions call for a 30-amp, 240-volt circuit. NEC 110.3(B) requires listed equipment to be installed according to its instructions, so those instructions — not a rule of thumb — set the circuit. The label may also state a minimum.
In the dwelling load calculation that sizes a service, NEC 220.54 counts an electric clothes dryer at 5,000 watts or its nameplate rating, whichever is larger — which is why a dryer is one of the loads that matters when a service is already near capacity.
Three-wire or four-wire
A new dryer circuit uses a four-wire receptacle, NEMA 14-30: two hots, a neutral and a separate equipment grounding conductor. The older three-wire arrangement, NEMA 10-30, used the neutral as the ground as well. NEC 250.140 permits that only for existing branch circuits — so a three-wire outlet in an older house can stay, but a new or replaced circuit is four-wire.
The dryer's cord has to match the receptacle, and the bonding strap on the dryer's terminal block changes with it: left in place with a three-wire cord, removed with a four-wire cord. Getting that wrong puts current on the dryer's cabinet. The dryer's instructions show the connection for each.
GFCI protection
The 2020 NEC extended GFCI protection in the listed locations — laundry areas among them — to receptacles up to 250 volts on single-phase circuits of 150 volts or less to ground. That brings a 240-volt dryer receptacle in a laundry area under the requirement. Whether it applies to a given house depends on the edition the jurisdiction has adopted and any local amendment.
Do not upsize the breaker
If a dryer trips its breaker, the breaker is protecting the wire behind it. A larger breaker does not fix the dryer; it removes the protection. A dryer that trips a correctly sized circuit has a fault — often a failing element shorting to the housing — to diagnose.
Gas dryers: a few amps at 120 volts
A gas dryer uses electricity for the drum motor, the controls and the igniter, which together draw a few amps at 120 volts. It plugs into an ordinary receptacle. In a dwelling, NEC 210.11(C)(2) requires at least one 20-amp laundry branch circuit for the laundry receptacle outlets, and that is where a gas dryer and the washer normally plug in.
A gas dryer still needs a properly installed gas connection and shutoff — the rules for that are in what the code requires at a gas appliance connection — and, like an electric dryer, an exhaust duct that meets its length and termination limits.
On a 208-volt supply
Many apartments and some condos are served at 120/208 volts rather than 120/240. A heating element's output falls with the square of the voltage, so a 240-volt element on 208 volts delivers:
- (208 ÷ 240)² = about 75 percent of its rated heat
- a 5,400 W element produces roughly 4,060 W
The dryer still works; it takes longer to dry a load. Many dryers are rated for both voltages, and some manufacturers offer a 208-volt element. The volts to watts calculator works out the figure for any element and supply.
Energy per load
Energy depends on how long the element is actually on. Take a 5,400-watt element that runs for 30 minutes of a 45-minute cycle, plus a motor drawing about 300 watts throughout:
- element: 5.4 kW × 0.5 h = 2.7 kWh
- motor: 0.3 kW × 0.75 h ≈ 0.23 kWh
- about 2.9 kWh for the load
The illustration is arithmetic, not a rating for any particular dryer. The biggest single factor you control is the vent: a long, crushed or lint-choked duct makes the element run longer on every load. The dryer vent length calculator checks a run against its maximum length, and where a dryer vent can and cannot terminate covers the outside end.
To convert a dryer's figures between units, the amps to kW calculator and watts to amps calculator handle the arithmetic.
When a laundry room is being moved, a dryer is switching from gas to electric, or a service is getting close to its limit, the circuit is worth settling on paper first. On the home improvement work Seamless Home runs, circuits and venting are planned during design rather than decided on installation day — get a free estimate to start. Coverage is confirmed per service area rather than promised as blanket availability.
Frequently asked questions
How many amps does an electric dryer use?
A full-size electric dryer typically draws roughly 20 to 25 amps at 240 volts while the heating element is on, and only a few amps during the tumble and cool-down portions of a cycle, when the element is off and the motor alone runs. The element cycles on and off under its thermostat, so the draw moves between those figures through a load. The rating label, usually inside the door or on the back, states the maximum.
How many amps does a gas dryer use?
Only a few, typically well under 10 amps at 120 volts. A gas dryer burns gas for heat and uses electricity for the drum motor, the controls and the igniter. It plugs into an ordinary 120-volt receptacle, which in a dwelling laundry area is on the 20-amp laundry branch circuit NEC 210.11(C)(2) requires. It still needs a gas supply and an approved vent.
How many watts does a dryer use?
An electric dryer's heating element is commonly around 5,000 to 5,600 watts, and the motor adds a few hundred. Energy per load depends on how long the element is on: a 5,400-watt element that is on for 30 minutes of a 45-minute cycle uses about 2.7 kWh, plus the motor's share. A gas dryer uses a few hundred watts of electricity while running, and its heat comes from gas.
What size breaker does a dryer need?
Most full-size electric dryers' installation instructions call for a 30-amp, 240-volt circuit, and NEC 110.3(B) requires listed equipment to be installed according to its instructions. The label or the instructions state the required circuit, and that governs. A gas dryer needs a 120-volt receptacle, normally on the 20-amp laundry circuit. Never install a larger breaker to stop a dryer tripping — the breaker protects the wire behind it.
Do I need a 3-prong or 4-prong dryer outlet?
A new dryer circuit uses a four-wire receptacle — NEMA 14-30, with two hots, a neutral and an equipment ground. NEC 250.140 permits the older three-wire arrangement, where the neutral also serves as the ground, only for existing branch circuits. A dryer connected to an existing three-wire outlet is wired with a three-wire cord and the bonding strap left in place; with a four-wire cord, the strap is removed. The dryer's instructions show which.
Does a dryer outlet need GFCI protection?
Under the 2020 NEC and later, typically yes. That edition extended GFCI protection in the listed locations to receptacles up to 250 volts on single-phase circuits of 150 volts or less to ground, and laundry areas are one of those locations — which includes a 240-volt dryer receptacle. Whether it applies to a given house depends on the edition the jurisdiction has adopted and any local amendment.
Will a 240 volt dryer work on 208 volts?
Many dryers are rated for both, but a heating element designed for 240 volts produces about 75 percent of its rated heat at 208 volts, because a resistive element's output falls with the square of the voltage. Drying takes longer. Some manufacturers offer a 208-volt element or list a dryer for 120/208-volt service; the rating label and instructions say which.