Temperature Conversion Table

Temperature Conversion Table

All protocol temperatures are Celsius. Convert for display using this table. When converting Fahrenheit → Celsius and two Celsius entries share the same Fahrenheit value, use the first table entry (example: 64 °F → 17.5 °C, not 18 °C).

The table is the guide's Appendix 1, verbatim (191 pairs, −40 °C to 55 °C in 0.5 °C steps). Note the °F values are the guide's own rounding, not pure C×9/5+32 math — always use the table, not the formula, when matching thermostat behavior. Read each °C | °F pair-column top to bottom, then continue at the top of the next pair-column (column-major).

°C	°F	°C	°F	°C	°F	°C	°F	°C	°F
-40	-40	-20.5	-5	-1	30	18.5	65	38	100
-39.5	-39	-20	-4	-0.5	31	19	66	38.5	101
-39	-38	-19.5	-3	0	32	19.5	67	39	102
-38.5	-37	-19	-2	0.5	33	20	68	39.5	103
-38	-36	-18.5	-1	1	34	20.5	69	40	104
-37.5	-36	-18	0	1.5	35	21	70	40.5	105
-37	-35	-17.5	1	2	36	21.5	71	41	106
-36.5	-34	-17	1	2.5	37	22	72	41.5	107
-36	-33	-16.5	2	3	37	22.5	73	42	108
-35.5	-32	-16	3	3.5	38	23	73	42.5	109
-35	-31	-15.5	4	4	39	23.5	74	43	109
-34.5	-30	-15	5	4.5	40	24	75	43.5	110
-34	-29	-14.5	6	5	41	24.5	76	44	111
-33.5	-28	-14	7	5.5	42	25	77	44.5	112
-33	-27	-13.5	8	6	43	25.5	78	45	113
-32.5	-27	-13	9	6.5	44	26	79	45.5	114
-32	-26	-12.5	10	7	45	26.5	80	46	115
-31.5	-25	-12	10	7.5	46	27	81	46.5	116
-31	-24	-11.5	11	8	46	27.5	82	47	117
-30.5	-23	-11	12	8.5	47	28	82	47.5	118
-30	-22	-10.5	13	9	48	28.5	83	48	118
-29.5	-21	-10	14	9.5	49	29	84	48.5	119
-29	-20	-9.5	15	10	50	29.5	85	49	120
-28.5	-19	-9	16	10.5	51	30	86	49.5	121
-28	-18	-8.5	17	11	52	30.5	87	50	122
-27.5	-18	-8	18	11.5	53	31	88	50.5	123
-27	-17	-7.5	19	12	54	31.5	89	51	124
-26.5	-16	-7	19	12.5	55	32	90	51.5	125
-26	-15	-6.5	20	13	55	32.5	91	52	126
-25.5	-14	-6	21	13.5	56	33	91	52.5	127
-25	-13	-5.5	22	14	57	33.5	92	53	127
-24.5	-12	-5	23	14.5	58	34	93	53.5	128
-24	-11	-4.5	24	15	59	34.5	94	54	129
-23.5	-10	-4	25	15.5	60	35	95	54.5	130
-23	-9	-3.5	26	16	61	35.5	96	55	131
-22.5	-9	-3	27	16.5	62	36	97
-22	-8	-2.5	28	17	63	36.5	98
-21.5	-7	-2	28	17.5	64	37	99
-21	-6	-1.5	29	18	64	37.5	100