MusiCalc is a multi-functional HyperCard-based music and time calculator which will prove useful to anyone who needs to add, subtract, multiply, and divide time on a scale of minutes and seconds. The great advantage of this time calculator, above others available, is that the entries are free-form and may be corrected, annotated, copied, cut, pasted, and recalculated. If you work with music, video, film, etc., you will appreciate MusiCalc. MusiCalc consists of 4 calculator elements: 1) MusiCalc, a calculator for musical time relationships; 2) TimeCalc, a time calculator which properly adds, subtracts, multiplies and divides minutes, seconds, frames, and bits; 3) BarCalc, a formula evaluator which simplifies computing the length of a piece of music; and 4) SMPTECalc, which calculates sum and difference times using a stored SMPTE timecode.