One way of doing this yourself by doing a simple RC oscillator or ramp generator
with a current source, and measure trip points, time and V and calculate the C. Use
a current source, opamp/comparator and reference or a LM334 type of part. Needless
to say if using a scope and / or a DVM those have to be caled.
It all depends on the accuracy you want to achieve. Electrolytics are very imprecise
C's, with strong T dependence. Generally the low % accuracy measurements adequate.
Example, ramp approach Q = C x V, or I = C x dV/dT, C = (I x dT) / dV
Obviously in above your accuracy is dependent on accuracy of each equation element,
dV, dT, and current, so do an error budget to see if you are meeting your goals.
Lots of info here :
https://en.wikipedia.org/wiki/Electrolytic_capacitor
You can use some ESR meters for C measurement, and they can be reasonably accurate.
1 - 2% kinds of accuracy for the cheap ones., for large C values, << 1% for sub 1 uF types
of caps. Accuracies similiar to many low cost DVMs. Some esr meters even give you the
vector values :
Other approaches :
https://www.youtube.com/results?search_query=capacitance+measurment
Regards, Dana.