●1. Calculation of tumor marker - doubling time and doubling rate.
To calculate tumor marker —doubling time and doubling rate with the data of serial measurements of a serum tumor marker.

●2. Calculation of tumor volume - doubling time and doubling rate
To calculate tumor volume - doubling time and doubling rate with the data of serial measurements of tumor sizes.

●3. Estimation of time for progression
To estimate the time (T) for a tumor with a known doubling time (DT) or doubling rate (DR) of size A to grow to size B. If you input DT or DR, A, and B, the calculator gives T.

●4. Estimation of progression over time
To estimate the time D after a given time (T) of a tumor of size C with a known doubling
time (DT) or doubling rate (DR).

●5. If you input DT or DR, C, and T, the calculator gives D.