A corded 7-1/4 inch circular saw draws about 1,400 watts while cutting (roughly 1,000-1,800 W; most are 15-amp tools) and about 2,300 W for a moment at start-up.
- Running watts
- 1,400 WTypical; 1,000–1,800 W across models
- Starting watts
- 2,300 WGenerac lists about 2,300 W at start-up for a 7-1/4 inch saw; the…
- Per day
- 0.35 kWh0.25 h of use
- Current
- 11.7 AAt 120 V while running
Figures checked against DOE, ENERGY STAR and manufacturer data on . Your model's label is the final word.
Watts by model and setting
Most circular saw models draw between 1,000 and 1,800 W while running; a typical one draws about 1,400 W. Assumes about 15 minutes of actual cutting on a day the saw is used; 1,400 W x 0.25 h = 0.35 kWh.
- Motor rating: most full-size corded saws are 13-15 A
- Material and blade: ripping thick hardwood or using a dull blade loads the motor more
- Free-spinning draw is well below the cutting draw
- Worm-drive saws and larger blades draw more than sidewinder 7-1/4 inch saws
Running a circular saw on a generator or power station
- Generator: at least 1,400 running watts and 3,700 starting watts (running plus the 2,300 W start surge, the cautious way to size it). Check both numbers on the spec sheet. A generator rated 4,500 W or more covers it with room to spare.
- Power station: continuous output of at least 1,400 W and a surge rating that covers about 2,300 W. Pure sine wave output is the safe choice for motors and electronics.
| Power station capacity | Estimated runtime |
|---|---|
| 500 Wh | 0.3 h |
| 1,000 Wh | 0.6 h |
| 2,000 Wh | 1.2 h |
| 3,000 Wh | 1.8 h |
Based on 1,400 W average draw and 85% usable capacity.
- A 3,000 W generator handles a circular saw with headroom; a 2,000 W inverter generator can work but may bog down in heavy cuts
- Power stations need a continuous rating above about 1,800 W for a 15 A saw under full load
- Use a 12-gauge cord for long runs to avoid voltage drop
- Run a gas generator outdoors only, at least 20 feet from doors, windows and vents; carbon monoxide from generators kills. Use heavy-duty extension cords or a professionally installed transfer switch, never backfeed a home outlet.
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Questions people ask
What size generator do I need for a circular saw?
Plan on at least 2,300-2,500 starting watts; Generac's chart lists a 7-1/4 inch saw at 1,400 W running and 2,300 W starting. A 3,000 W generator gives comfortable headroom.
Can a 1500W power station run a circular saw?
It may start and run light cuts, but a 15 A saw can pull up to about 1,800 W under load and may trip a 1,500 W power station. Look for 2,000 W continuous or more.