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PT100 resistance table: full chart (-200 to 850 °C) per IEC 60751

Aug 14, 2026

A PT100 reads 100.00 Ω at 0 °C and 138.51 Ω at 100 °C, an average slope of 0.385 Ω per °C. The tables below give every 10 °C step from -200 to 850 °C, calculated from the Callendar-Van Dusen equation per IEC 60751 / DIN EN 60751. Use the interactive converter for 1 °C steps or fractional temperatures, or download the full CSV dataset.

What the numbers mean

A PT100 is a platinum resistance temperature detector with nominal resistance R0 = 100.00 Ω at 0 °C. Its temperature coefficient α is 0.003851 °C⁻¹. Every PT100 follows the same normalized platinum curve as a PT1000, scaled by a factor of 10.

Reference point	PT100 resistance	PT1000 resistance	Sensitivity ΔR/ΔT
-200 °C (cryogenic limit)	18.52 Ω	185.20 Ω	~0.431 Ω/°C
0 °C (ice point)	100.00 Ω	1000.00 Ω	0.385 Ω/°C
100 °C (steam point)	138.51 Ω	1385.06 Ω	0.375 Ω/°C
850 °C (upper limit)	390.48 Ω	3904.81 Ω	~0.247 Ω/°C

Complete PT100 resistance table

The tables below show resistance values in 10 °C steps across the entire standardized range from -200 to 850 °C. Read the row for the tens digit and the column for the ones digit.

Negative range, -200 to -10 °C

°C	0	-1	-2	-3	-4	-5	-6	-7	-8	-9
-200	18.52	—	—	—	—	—	—	—	—	—
-190	22.83	22.40	21.97	21.54	21.11	20.68	20.25	19.82	19.38	18.95
-180	27.10	26.67	26.25	25.82	25.39	24.97	24.54	24.11	23.68	23.25
-170	31.34	30.91	30.49	30.07	29.64	29.22	28.80	28.37	27.95	27.52
-160	35.54	35.12	34.70	34.28	33.86	33.44	33.02	32.60	32.18	31.76
-150	39.72	39.31	38.89	38.47	38.05	37.64	37.22	36.80	36.38	35.96
-140	43.88	43.46	43.05	42.63	42.22	41.80	41.39	40.97	40.56	40.14
-130	48.00	47.59	47.18	46.77	46.36	45.94	45.53	45.12	44.70	44.29
-120	52.11	51.70	51.29	50.88	50.47	50.06	49.65	49.24	48.83	48.42
-110	56.19	55.79	55.38	54.97	54.56	54.15	53.75	53.34	52.93	52.52
-100	60.26	59.85	59.44	59.04	58.63	58.23	57.82	57.41	57.01	56.60
-90	64.30	63.90	63.49	63.09	62.68	62.28	61.88	61.47	61.07	60.66
-80	68.33	67.92	67.52	67.12	66.72	66.31	65.91	65.51	65.11	64.70
-70	72.33	71.93	71.53	71.13	70.73	70.33	69.93	69.53	69.13	68.73
-60	76.33	75.93	75.53	75.13	74.73	74.33	73.93	73.53	73.13	72.73
-50	80.31	79.91	79.51	79.11	78.72	78.32	77.92	77.52	77.12	76.73
-40	84.27	83.87	83.48	83.08	82.68	82.29	81.89	81.50	81.10	80.70
-30	88.22	87.83	87.43	87.04	86.64	86.25	85.85	85.46	85.06	84.67
-20	92.16	91.77	91.37	90.98	90.59	90.19	89.80	89.41	89.01	88.62
-10	96.09	95.69	95.30	94.91	94.52	94.12	93.73	93.34	92.95	92.55

Positive range, 0 to 850 °C

°C	0	1	2	3	4	5	6	7	8	9
0	100.00	100.39	100.78	101.17	101.56	101.95	102.34	102.73	103.12	103.51
10	103.90	104.29	104.68	105.07	105.46	105.85	106.24	106.63	107.02	107.40
20	107.79	108.18	108.57	108.96	109.35	109.73	110.12	110.51	110.90	111.29
30	111.67	112.06	112.45	112.83	113.22	113.61	114.00	114.38	114.77	115.15
40	115.54	115.93	116.31	116.70	117.08	117.47	117.86	118.24	118.63	119.01
50	119.40	119.78	120.17	120.55	120.94	121.32	121.71	122.09	122.47	122.86
60	123.24	123.63	124.01	124.39	124.78	125.16	125.54	125.93	126.31	126.69
70	127.08	127.46	127.84	128.22	128.61	128.99	129.37	129.75	130.13	130.52
80	130.90	131.28	131.66	132.04	132.42	132.80	133.18	133.57	133.95	134.33
90	134.71	135.09	135.47	135.85	136.23	136.61	136.99	137.37	137.75	138.13
100	138.51	138.88	139.26	139.64	140.02	140.40	140.78	141.16	141.54	141.91
110	142.29	142.67	143.05	143.43	143.80	144.18	144.56	144.94	145.31	145.69
120	146.07	146.44	146.82	147.20	147.58	147.95	148.33	148.70	149.08	149.46
130	149.83	150.21	150.58	150.96	151.33	151.71	152.08	152.46	152.83	153.21
140	153.58	153.96	154.33	154.71	155.08	155.46	155.83	156.20	156.58	156.95
150	157.33	157.70	158.07	158.45	158.82	159.19	159.56	159.94	160.31	160.68
200	175.86	176.22	176.59	176.96	177.33	177.69	178.06	178.43	178.79	179.16
250	194.10	194.46	194.82	195.18	195.55	195.91	196.27	196.63	196.99	197.35
300	212.05	212.41	212.76	213.12	213.48	213.83	214.19	214.54	214.90	215.25
350	229.72	230.07	230.42	230.77	231.12	231.47	231.82	232.17	232.52	232.86
400	247.09	247.44	247.78	248.13	248.47	248.81	249.16	249.50	249.85	250.19
450	264.18	264.52	264.86	265.20	265.53	265.87	266.21	266.55	266.89	267.22
500	280.98	281.31	281.64	281.98	282.31	282.64	282.97	283.31	283.64	283.97
550	297.49	297.81	298.14	298.47	298.80	299.12	299.45	299.78	300.10	300.43
600	313.71	314.03	314.35	314.67	314.99	315.31	315.64	315.96	316.28	316.60
650	329.64	329.96	330.27	330.59	330.90	331.22	331.53	331.85	332.16	332.48
700	345.28	345.59	345.90	346.21	346.52	346.83	347.14	347.45	347.76	348.07
750	360.64	360.94	361.25	361.55	361.85	362.16	362.46	362.76	363.07	363.37
800	375.70	376.00	376.30	376.60	376.90	377.20	377.49	377.79	378.09	378.39
850	390.48	—	—	—	—	—	—	—	—	—

Download the full 1 °C step PT100 table (CSV, 1051 rows, -200 to 850 °C)

PT100 Temperature ↔ Resistance Converter

Temperature (°C):

Resistance (Ω):

The equations behind the table

The standard resistance-temperature curve of platinum RTDs is specified by the Callendar-Van Dusen equation per IEC 60751:

For t ≥ 0 °C:
R(t) = R0 × (1 + A·t + B·t²)

For t < 0 °C:
R(t) = R0 × [1 + A·t + B·t² + C·(t - 100)·t³]

Coefficient	Value	Unit
R0	100.00	Ω
A	3.9083 × 10⁻³	°C⁻¹
B	-5.775 × 10⁻⁷	°C⁻²
C	-4.183 × 10⁻¹²	°C⁻⁴ (used only below 0 °C)

Standard European curve (α = 0.00385) vs legacy curves

The table above uses α = 0.003851 °C⁻¹, the European standard adopted by IEC 60751, DIN EN 60751, and ASTM E1137. Legacy American (α = 0.00392) or Japanese (JIS C1604, α = 0.003916) sensors have higher resistance at 100 °C (139.16 to 139.20 Ω). Mixing an α = 0.003916 sensor with an α = 0.00385 lookup table causes a positive reading error that grows with temperature (~1.6 °C at 300 °C).

IEC 60751 tolerance classes for PT100

IEC 60751 defines four tolerance classes that bound the permitted temperature deviation |Δt| in °C:

Class	Tolerance formula (±°C)	Valid range (Thin-film)	Valid range (Wire-wound)	Error @ 0 °C	Error @ 100 °C
Class AA (F0.1)	0.10 + 0.0017×\|t\|	0 to 150 °C	-50 to 250 °C	±0.10 °C (±0.039 Ω)	±0.27 °C (±0.102 Ω)
Class A (F0.15)	0.15 + 0.0020×\|t\|	-30 to 300 °C	-100 to 450 °C	±0.15 °C (±0.059 Ω)	±0.35 °C (±0.133 Ω)
Class B (F0.3)	0.30 + 0.0050×\|t\|	-50 to 500 °C	-196 to 600 °C	±0.30 °C (±0.117 Ω)	±0.80 °C (±0.303 Ω)
Class C (F0.6)	0.60 + 0.0100×\|t\|	-50 to 600 °C	-196 to 600 °C	±0.60 °C (±0.234 Ω)	±1.60 °C (±0.607 Ω)

PT100 or PT1000: same curve, different error budget

Comparison of 2-wire 3-wire and 4-wire RTD wiring configurations for PT1000 sensors

PT100 and PT1000 share the same normalized curve shape. Because a PT100's resistance is 10 times lower, its sensitivity is 0.385 Ω/°C compared to 3.85 Ω/°C for a PT1000. This makes lead wire resistance 10 times more critical on a PT100:

Wiring setup	PT100 temperature error (30m 24AWG, ~5.04 Ω)	PT1000 temperature error (30m 24AWG, ~5.04 Ω)
2-wire	~13.1 °C (Unusable without zeroing)	~1.31 °C
3-wire	~0.05 to 0.13 °C (Depends on lead balance)	~0.005 to 0.013 °C
4-wire	<0.01 °C (Lead resistance fully cancelled)	<0.01 °C

When you should still specify PT100

Legacy PLC / DCS systems: Older analog input cards only support PT100.
High excitation current tolerance: A PT100 dissipates less self-heating power at a given current (P = I²R). Standard 1.0 mA excitation generates 0.1 mW on PT100 vs 1.0 mW on PT1000.
High-vibration ceramic wire-wound elements: Available in broader mechanical configurations.

Element construction: thin film, ceramic and glass

Thin film vs wire wound PT1000 RTD element construction comparison

Construction	Temperature range	Vibration resistance	Best suited for
Thin-film	-50 to 500 °C	High	HVAC, automotive, high-volume OEM probes
Glass wire-wound	-220 to 400 °C	Moderate	Cryogenic applications, chemical immersion
Ceramic wire-wound	-200 to 850 °C	Moderate	High-temperature furnaces, calibration standards

Can a PT100 run on a PT1000 transmitter?

No. Connecting a PT100 to a channel configured for PT1000 causes a major underflow fault. The transmitter expects ~1000 Ω at 0 °C and sees ~100 Ω, interpreting it as an open circuit or severe under-temperature fault. Reconfigure the input channel type in the transmitter settings first.

FAQ

What is the resistance of a PT100 at 0 °C?
Exactly 100.00 Ω under IEC 60751.

What is the resistance of a PT100 at 100 °C?
138.51 Ω.

Why does my multimeter show 108.5 Ω?
At a room temperature of 22 °C, a healthy PT100 measures ~108.57 Ω.