To Convert:                 Into:                        Multiply By:
 ─────────────────────────── ──────────────────────────── ──────────────────
 tons refrig. (US standard)  btu (IST)                    288000.0
 tons refrig. (US standard)  btu (mean)                   287774
 tons refrig. (US standard)  cal., kg. (IST)              72574.8
 tons refrig. (US standard)  cal., kg. (mean)             72517.9
 tons refrig. (US standard)  pounds ice melted            2009.1