Part review, part instruction. I recently purchased a Gdealer Instant Read Thermometer on Amazon for under $10. Let's see how it performs in some real-world metrology. The method I use here can be used to calibrate nearly any kitchen thermometer so check it out.
As promised link to NIST ice point vid:    • Ice Point Calibration  
And a helpful calculator to calculate what temperature the boiling point of water is right here, right now: https://www.thermoworks.com/bpcalc