Harbor Freight has clamp meters for as little as $15 although I don't know how accurate they are. I bought one off of Amazon for about $50 and I use it all the time. Most of them have AC/DC switch so you can use them in the house or shop to measure amps in house wiring also.
I haven't always had the best luck with Harbor Freight electronics, so after looking around I went out and splurged about $90 bucks for this one at Lowe's. I think it will be a good long-term investment.
https://www.idealind.com/us/en/shop.../400a-ac-dc-tightsightr-clamp-meter.html
