Jonathan Green’s easy to use Soil pH Test Kit determines pH levels in just five minutes. The kit includes one test tube, one capsule of powder and one pH range card to indicate the results. It is important to use either distilled water or rainwater when performing this test in order to get accurate pH readings. Tap water has been pH adjusted by municipal water authorities and this will affect the reading.
This is an at-home pH test, if you're looking for a soil test kit to send out and get a full profile of your soil, try the kit listed here.