Need help estimating calorie burn

IrisFlute

Hey, all you gym-going people ... Can you help me out with a ballpark figure for calories I just burned? I just spent 45 minutes tossing hunks of firewood. They're heavy -- rainsoaked maple quarter-rounds, mostly. Some were smaller chunks. I could only toss each one about 15 feet, and I had to stop and catch my breath for a few seconds after every half dozen or so. Definitely made me sweat. Definitely got my heart rate up. I'm a 150-lb woman, 59 years old, 5 feet 8 inches. Thanks for any numbers you can come up with for me.