timeCalc Lite is a calculator only for calculation of time. Ease of use was created in the first place simply anyhow. I think that it can use sensuously like the usual calculator. I think that it is useful for business lives in addition to calculation of the time in everyday life, such as calculation of overtime. * The calculation function of the second bit is excluded. → timeCalc Advance timeCalc Lite is free software. Use at your own risk.