Most home scales read up to around 350 Lbs. plus some.
They're not real accurate but will be fairly close.
Be sure that scale is on something flat and does not rock, it throws off the measurement.
Weigh each wheel and tongue, then add.
Most little trailers empty will be well under 700Lbs. (350 x 2 plus tongue weight)
If you're needing near exact measurements, place an equivalent thickness under the opposite wheel for levelness. Shake the trailer a little to find the weights consistent weight.
I've read someone used 2 scales and a chunk of wood to bridge across the 2 scales. Total weight measurable, ~700 Lbs. each wheel, 1400 Lbs total.
GOOD LUCK