Know the worth and value of your equity
Startup Valuation Calculator
Post and pre-money valuation calculator does simple math to free your mind up to do more important things when you are negotiating your startup's valuation.
It does not answer the question "how much is my startup worth" in the general sense (based on how much revenue, traction, margins or whether it breaks even).
Instead, it does multi-directional math, and, if you provide any two values from investment amount, investor's equity, pre-money or post money valuation, you will receive the remaining two values.