Clinical Unit Converter & Fever Chart

Temperature

From

Converted

The Conversion Formulas

°F = °C × 9/5 + 32 and °C = (°F − 32) × 5/9. 1 kg = 2.20462 lb (exams round to 2.2), and 1 stone = 14 lb = 6.35 kg. 1 inch = 2.54 cm. For blood glucose, mmol/L × 18 = mg/dL, so 7.0 mmol/L is 126 mg/dL.

Temperature and Fever

A temperature of 38.0°C (100.4°F) or higher is a fever. Normal body temperature usually sits between 36.1 and 37.2°C (97–99°F), lowest in the early morning and highest in the late afternoon. The number also depends on where you measured it. Axillary readings run lower than oral ones, and rectal and core readings run higher, so a reading means little without its site. Chart them together.

The bands below are the ones most nursing references use. Hypothermia stages follow the standard clinical classification. The fever bands above 38°C are conventions rather than strict definitions, and your facility may use different trigger points for escalation.

Band	Celsius	Fahrenheit
Severe hypothermia	below 28.0°C	below 82.4°F
Moderate hypothermia	28.0–31.9°C	82.4–89.4°F
Mild hypothermia	32.0–34.9°C	89.6–94.8°F
Below the usual range	35.0–36.0°C	95.0–96.8°F
Normal	36.1–37.2°C	97.0–99.0°F
Borderline (low-grade)	37.3–37.9°C	99.1–100.2°F
Fever	38.0–38.9°C	100.4–102.0°F
High fever	39.0–40.9°C	102.2–105.6°F
Hyperpyrexia	41.0°C or higher	105.8°F or higher

Is it a fever? Common readings

Reading	Band	What it usually means for an adult
36.9°C / 98.4°F	Normal	Within the usual range.
37.5°C / 99.5°F	Borderline	Above the usual range but below the fever threshold. Recheck and look for other signs.
37.8°C / 100.0°F	Borderline	Close to the threshold, not yet a fever. Recheck with the same method and site.
38.0°C / 100.4°F	Fever	The threshold: from here a temperature counts as a fever.
38.4°C / 101.1°F	Fever	Fever. Assess the patient, and follow orders and protocol for antipyretics and fluids.
38.9°C / 102.0°F	Fever	Fever. Monitor closely and report as your protocol requires.
39.0°C / 102.2°F	High fever	High fever. Report it; look for a cause and for warning signs.
39.5°C / 103.1°F	High fever	High fever. Watch for dehydration, confusion and changes in breathing.
40.0°C / 104.0°F	High fever	Needs prompt medical review.
40.5°C / 104.9°F	High fever	Dangerous, especially with confusion or breathing difficulty. Escalate.
41.0°C / 105.8°F	Hyperpyrexia	Medical emergency.

Escalate sooner, whatever the number, for a fever with a stiff neck, severe headache, confusion, difficulty breathing, a rash that does not fade under pressure, or a seizure. In an infant under 3 months, any temperature of 38.0°C or more needs prompt medical assessment. Older adults and immunocompromised patients can be seriously unwell with only a small rise, or none.

Celsius to Fahrenheit table, 35.0–41.5°C

Celsius	Fahrenheit
35.0°C	95.0°F
35.1°C	95.2°F
35.2°C	95.4°F
35.3°C	95.5°F
35.4°C	95.7°F
35.5°C	95.9°F
35.6°C	96.1°F
35.7°C	96.3°F
35.8°C	96.4°F
35.9°C	96.6°F
36.0°C	96.8°F
36.1°C	97.0°F
36.2°C	97.2°F
36.3°C	97.3°F
36.4°C	97.5°F
36.5°C	97.7°F
36.6°C	97.9°F
36.7°C	98.1°F
36.8°C	98.2°F
36.9°C	98.4°F
37.0°C	98.6°F
37.1°C	98.8°F
37.2°C	99.0°F
37.3°C	99.1°F
37.4°C	99.3°F
37.5°C	99.5°F
37.6°C	99.7°F
37.7°C	99.9°F
37.8°C	100.0°F
37.9°C	100.2°F
38.0°C	100.4°F
38.1°C	100.6°F
38.2°C	100.8°F
38.3°C	100.9°F
38.4°C	101.1°F
38.5°C	101.3°F
38.6°C	101.5°F
38.7°C	101.7°F
38.8°C	101.8°F
38.9°C	102.0°F
39.0°C	102.2°F
39.1°C	102.4°F
39.2°C	102.6°F
39.3°C	102.7°F
39.4°C	102.9°F
39.5°C	103.1°F
39.6°C	103.3°F
39.7°C	103.5°F
39.8°C	103.6°F
39.9°C	103.8°F
40.0°C	104.0°F
40.1°C	104.2°F
40.2°C	104.4°F
40.3°C	104.5°F
40.4°C	104.7°F
40.5°C	104.9°F
40.6°C	105.1°F
40.7°C	105.3°F
40.8°C	105.4°F
40.9°C	105.6°F
41.0°C	105.8°F
41.1°C	106.0°F
41.2°C	106.2°F
41.3°C	106.3°F
41.4°C	106.5°F
41.5°C	106.7°F

Fahrenheit to Celsius table, 95.0–107.0°F

Fahrenheit	Celsius
95.0°F	35.0°C
95.1°F	35.1°C
95.2°F	35.1°C
95.3°F	35.2°C
95.4°F	35.2°C
95.5°F	35.3°C
95.6°F	35.3°C
95.7°F	35.4°C
95.8°F	35.4°C
95.9°F	35.5°C
96.0°F	35.6°C
96.1°F	35.6°C
96.2°F	35.7°C
96.3°F	35.7°C
96.4°F	35.8°C
96.5°F	35.8°C
96.6°F	35.9°C
96.7°F	35.9°C
96.8°F	36.0°C
96.9°F	36.1°C
97.0°F	36.1°C
97.1°F	36.2°C
97.2°F	36.2°C
97.3°F	36.3°C
97.4°F	36.3°C
97.5°F	36.4°C
97.6°F	36.4°C
97.7°F	36.5°C
97.8°F	36.6°C
97.9°F	36.6°C
98.0°F	36.7°C
98.1°F	36.7°C
98.2°F	36.8°C
98.3°F	36.8°C
98.4°F	36.9°C
98.5°F	36.9°C
98.6°F	37.0°C
98.7°F	37.1°C
98.8°F	37.1°C
98.9°F	37.2°C
99.0°F	37.2°C
99.1°F	37.3°C
99.2°F	37.3°C
99.3°F	37.4°C
99.4°F	37.4°C
99.5°F	37.5°C
99.6°F	37.6°C
99.7°F	37.6°C
99.8°F	37.7°C
99.9°F	37.7°C
100.0°F	37.8°C
100.1°F	37.8°C
100.2°F	37.9°C
100.3°F	37.9°C
100.4°F	38.0°C
100.5°F	38.1°C
100.6°F	38.1°C
100.7°F	38.2°C
100.8°F	38.2°C
100.9°F	38.3°C
101.0°F	38.3°C
101.1°F	38.4°C
101.2°F	38.4°C
101.3°F	38.5°C
101.4°F	38.6°C
101.5°F	38.6°C
101.6°F	38.7°C
101.7°F	38.7°C
101.8°F	38.8°C
101.9°F	38.8°C
102.0°F	38.9°C
102.1°F	38.9°C
102.2°F	39.0°C
102.3°F	39.1°C
102.4°F	39.1°C
102.5°F	39.2°C
102.6°F	39.2°C
102.7°F	39.3°C
102.8°F	39.3°C
102.9°F	39.4°C
103.0°F	39.4°C
103.1°F	39.5°C
103.2°F	39.6°C
103.3°F	39.6°C
103.4°F	39.7°C
103.5°F	39.7°C
103.6°F	39.8°C
103.7°F	39.8°C
103.8°F	39.9°C
103.9°F	39.9°C
104.0°F	40.0°C
104.1°F	40.1°C
104.2°F	40.1°C
104.3°F	40.2°C
104.4°F	40.2°C
104.5°F	40.3°C
104.6°F	40.3°C
104.7°F	40.4°C
104.8°F	40.4°C
104.9°F	40.5°C
105.0°F	40.6°C
105.1°F	40.6°C
105.2°F	40.7°C
105.3°F	40.7°C
105.4°F	40.8°C
105.5°F	40.8°C
105.6°F	40.9°C
105.7°F	40.9°C
105.8°F	41.0°C
105.9°F	41.1°C
106.0°F	41.1°C
106.1°F	41.2°C
106.2°F	41.2°C
106.3°F	41.3°C
106.4°F	41.3°C
106.5°F	41.4°C
106.6°F	41.4°C
106.7°F	41.5°C
106.8°F	41.6°C
106.9°F	41.6°C
107.0°F	41.7°C

Body Weight: kg, lb and Stone

Drug doses are calculated per kilogram, so a weight given in pounds or stone has to be converted before any mg/kg calculation. The exact factor is 2.20462 lb per kg. Nursing programs and exams use 2.2, which only moves the answer in the decimals: 154 lb is 69.9 kg exactly and 70 kg using 2.2. Use whichever your program tells you to, and use it consistently.

The error that matters is not the decimal. A weight in pounds entered as if it were kilograms more than doubles every weight-based dose. Where you can, weigh on the unit scale in kilograms and document in kilograms, so nobody has to convert at all. To practice the conversion inside full dosing problems, try the weight-based dosing practice.

Pounds to kilograms, 10–300 lb

Pounds	Kilograms (exact factor)	Kilograms (÷ 2.2, exam method)
10 lb	4.5 kg	4.5 kg
20 lb	9.1 kg	9.1 kg
30 lb	13.6 kg	13.6 kg
40 lb	18.1 kg	18.2 kg
50 lb	22.7 kg	22.7 kg
60 lb	27.2 kg	27.3 kg
70 lb	31.8 kg	31.8 kg
80 lb	36.3 kg	36.4 kg
90 lb	40.8 kg	40.9 kg
100 lb	45.4 kg	45.5 kg
110 lb	49.9 kg	50.0 kg
120 lb	54.4 kg	54.5 kg
130 lb	59.0 kg	59.1 kg
140 lb	63.5 kg	63.6 kg
150 lb	68.0 kg	68.2 kg
160 lb	72.6 kg	72.7 kg
170 lb	77.1 kg	77.3 kg
180 lb	81.6 kg	81.8 kg
190 lb	86.2 kg	86.4 kg
200 lb	90.7 kg	90.9 kg
210 lb	95.3 kg	95.5 kg
220 lb	99.8 kg	100.0 kg
230 lb	104.3 kg	104.5 kg
240 lb	108.9 kg	109.1 kg
250 lb	113.4 kg	113.6 kg
260 lb	117.9 kg	118.2 kg
270 lb	122.5 kg	122.7 kg
280 lb	127.0 kg	127.3 kg
290 lb	131.5 kg	131.8 kg
300 lb	136.1 kg	136.4 kg

Kilograms to pounds and stone, 5–150 kg

Kilograms	Pounds	Stone and pounds
5 kg	11.0 lb	0 st 11 lb
10 kg	22.0 lb	1 st 8 lb
15 kg	33.1 lb	2 st 5 lb
20 kg	44.1 lb	3 st 2 lb
25 kg	55.1 lb	3 st 13 lb
30 kg	66.1 lb	4 st 10 lb
35 kg	77.2 lb	5 st 7 lb
40 kg	88.2 lb	6 st 4 lb
45 kg	99.2 lb	7 st 1 lb
50 kg	110.2 lb	7 st 12 lb
55 kg	121.3 lb	8 st 9 lb
60 kg	132.3 lb	9 st 6 lb
65 kg	143.3 lb	10 st 3 lb
70 kg	154.3 lb	11 st 0 lb
75 kg	165.3 lb	11 st 11 lb
80 kg	176.4 lb	12 st 8 lb
85 kg	187.4 lb	13 st 5 lb
90 kg	198.4 lb	14 st 2 lb
95 kg	209.4 lb	14 st 13 lb
100 kg	220.5 lb	15 st 10 lb
105 kg	231.5 lb	16 st 7 lb
110 kg	242.5 lb	17 st 5 lb
115 kg	253.5 lb	18 st 2 lb
120 kg	264.6 lb	18 st 13 lb
125 kg	275.6 lb	19 st 10 lb
130 kg	286.6 lb	20 st 7 lb
135 kg	297.6 lb	21 st 4 lb
140 kg	308.6 lb	22 st 1 lb
145 kg	319.7 lb	22 st 12 lb
150 kg	330.7 lb	23 st 9 lb

Stone to pounds and kilograms, 6–20 st

Stone	Pounds	Kilograms
6 st	84 lb	38.1 kg
7 st	98 lb	44.5 kg
8 st	112 lb	50.8 kg
9 st	126 lb	57.2 kg
10 st	140 lb	63.5 kg
11 st	154 lb	69.9 kg
12 st	168 lb	76.2 kg
13 st	182 lb	82.6 kg
14 st	196 lb	88.9 kg
15 st	210 lb	95.3 kg
16 st	224 lb	101.6 kg
17 st	238 lb	108.0 kg
18 st	252 lb	114.3 kg
19 st	266 lb	120.7 kg
20 st	280 lb	127.0 kg

Height: cm and Feet and Inches

Height feeds BMI, body surface area and ideal body weight, and those formulas want centimetres or inches. One inch is exactly 2.54 cm and one foot is 30.48 cm. To turn centimetres into feet and inches, divide by 2.54 to get total inches, then divide by 12: the whole number is feet and the remainder is inches. 175 cm ÷ 2.54 = 68.9 in, which is 5 ft 8.9 in.

Measure height standing, shoes off, rather than taking the patient's word for it. Self-reported heights tend to run high, and that error carries straight into a BSA-based dose. Use the BSA calculator or the ideal body weight calculator once you have the number.

Centimetres to feet and inches, 140–200 cm

Centimetres	Feet and inches	Total inches
140 cm	4 ft 7.1 in	55.1 in
142 cm	4 ft 7.9 in	55.9 in
144 cm	4 ft 8.7 in	56.7 in
146 cm	4 ft 9.5 in	57.5 in
148 cm	4 ft 10.3 in	58.3 in
150 cm	4 ft 11.1 in	59.1 in
152 cm	4 ft 11.8 in	59.8 in
154 cm	5 ft 0.6 in	60.6 in
156 cm	5 ft 1.4 in	61.4 in
158 cm	5 ft 2.2 in	62.2 in
160 cm	5 ft 3.0 in	63.0 in
162 cm	5 ft 3.8 in	63.8 in
164 cm	5 ft 4.6 in	64.6 in
166 cm	5 ft 5.4 in	65.4 in
168 cm	5 ft 6.1 in	66.1 in
170 cm	5 ft 6.9 in	66.9 in
172 cm	5 ft 7.7 in	67.7 in
174 cm	5 ft 8.5 in	68.5 in
176 cm	5 ft 9.3 in	69.3 in
178 cm	5 ft 10.1 in	70.1 in
180 cm	5 ft 10.9 in	70.9 in
182 cm	5 ft 11.7 in	71.7 in
184 cm	6 ft 0.4 in	72.4 in
186 cm	6 ft 1.2 in	73.2 in
188 cm	6 ft 2.0 in	74.0 in
190 cm	6 ft 2.8 in	74.8 in
192 cm	6 ft 3.6 in	75.6 in
194 cm	6 ft 4.4 in	76.4 in
196 cm	6 ft 5.2 in	77.2 in
198 cm	6 ft 6.0 in	78.0 in
200 cm	6 ft 6.7 in	78.7 in

Feet and inches to centimetres, 4 ft 8 in – 6 ft 6 in

Feet and inches	Centimetres
4 ft 8 in	142.2 cm
4 ft 9 in	144.8 cm
4 ft 10 in	147.3 cm
4 ft 11 in	149.9 cm
5 ft 0 in	152.4 cm
5 ft 1 in	154.9 cm
5 ft 2 in	157.5 cm
5 ft 3 in	160.0 cm
5 ft 4 in	162.6 cm
5 ft 5 in	165.1 cm
5 ft 6 in	167.6 cm
5 ft 7 in	170.2 cm
5 ft 8 in	172.7 cm
5 ft 9 in	175.3 cm
5 ft 10 in	177.8 cm
5 ft 11 in	180.3 cm
6 ft 0 in	182.9 cm
6 ft 1 in	185.4 cm
6 ft 2 in	188.0 cm
6 ft 3 in	190.5 cm
6 ft 4 in	193.0 cm
6 ft 5 in	195.6 cm
6 ft 6 in	198.1 cm

Blood Glucose: mg/dL and mmol/L

The US reports blood glucose in mg/dL. The UK, Canada, Australia and most of Europe use mmol/L. Multiply mmol/L by 18 to get mg/dL, or divide mg/dL by 18. The exact factor, from the molar mass of glucose, is 18.016, which makes no practical difference at the bedside. If a reading looks implausible after conversion, check which unit the meter or the lab report uses before acting on it.

The ranges below follow the American Diabetes Association. ADA defines level 3 hypoglycemia by symptoms, not by a number: altered mental or physical status that needs another person's help, at any glucose level. A single reading is not a diagnosis; diabetes is diagnosed on confirmed testing.

Category	mg/dL	mmol/L
Level 2 hypoglycemia	below 54	below 3.0
Level 1 hypoglycemia	54–69	3.0–3.8
Fasting, normal	70–99	3.9–5.5
Fasting, prediabetes	100–125	5.6–6.9
Fasting, diabetes range	126 or higher	7.0 or higher
2-hour OGTT, normal	below 140	below 7.8
2-hour OGTT, prediabetes	140–199	7.8–11.0
2-hour OGTT, diabetes range	200 or higher	11.1 or higher
Glucose threshold for HHS	600 or higher	33.3 or higher

mg/dL to mmol/L, 40–600 mg/dL

mg/dL	mmol/L
40 mg/dL	2.2 mmol/L
54 mg/dL	3.0 mmol/L
60 mg/dL	3.3 mmol/L
70 mg/dL	3.9 mmol/L
80 mg/dL	4.4 mmol/L
90 mg/dL	5.0 mmol/L
100 mg/dL	5.6 mmol/L
110 mg/dL	6.1 mmol/L
120 mg/dL	6.7 mmol/L
126 mg/dL	7.0 mmol/L
130 mg/dL	7.2 mmol/L
140 mg/dL	7.8 mmol/L
150 mg/dL	8.3 mmol/L
160 mg/dL	8.9 mmol/L
180 mg/dL	10.0 mmol/L
200 mg/dL	11.1 mmol/L
220 mg/dL	12.2 mmol/L
250 mg/dL	13.9 mmol/L
300 mg/dL	16.7 mmol/L
350 mg/dL	19.4 mmol/L
400 mg/dL	22.2 mmol/L
500 mg/dL	27.8 mmol/L
600 mg/dL	33.3 mmol/L

mmol/L to mg/dL, 3–33.3 mmol/L

mmol/L	mg/dL
3 mmol/L	54 mg/dL
3.9 mmol/L	70 mg/dL
4 mmol/L	72 mg/dL
5 mmol/L	90 mg/dL
5.5 mmol/L	99 mg/dL
6 mmol/L	108 mg/dL
7 mmol/L	126 mg/dL
8 mmol/L	144 mg/dL
9 mmol/L	162 mg/dL
10 mmol/L	180 mg/dL
11.1 mmol/L	200 mg/dL
12 mmol/L	216 mg/dL
15 mmol/L	270 mg/dL
20 mmol/L	360 mg/dL
25 mmol/L	450 mg/dL
33.3 mmol/L	600 mg/dL

📖 Sources: BIPM. The International System of Units (SI), 9th ed. 2019 · NIST SP 811, Guide for the Use of the SI (1 lb = 0.45359237 kg) · Crist C, Patel G. Hypothermia. StatPearls. 2026 · CDC definition of fever, 100.4°F (38°C) · American Diabetes Association. Standards of Care in Diabetes—2025, Sections 2 and 6. Diabetes Care. 2025;48(Suppl 1) · Umpierrez GE, et al. Hyperglycemic crises in adults with diabetes: a consensus report. Diabetes Care. 2024;47(8):1257–1275.

Related Calculators

Frequently Asked Questions

What is 37°C in Fahrenheit?

37°C is 98.6°F, the figure usually quoted as average body temperature. Normal body temperature actually covers a range, about 36.1–37.2°C (97–99°F), and varies through the day and by measurement site.

At what temperature is it a fever?

A temperature of 38.0°C (100.4°F) or higher counts as a fever. Between about 37.3 and 37.9°C is borderline. In an infant under 3 months, any temperature of 38.0°C or more needs prompt medical assessment.

Is 37.5°C a fever?

No. 37.5°C (99.5°F) is above the usual range but below the 38.0°C fever threshold. Recheck with the same method and site, and look at the rest of the assessment.

Is 39°C a high fever?

Yes. 39.0°C (102.2°F) is usually described as a high fever. It needs reporting, a look for the cause, and closer monitoring, following the orders and protocol in place.

How many pounds are in a kilogram?

1 kg is 2.20462 lb. To convert pounds to kilograms, divide by 2.20462; nursing exams round this to 2.2. A patient weighing 154 lb is 69.9 kg exactly, or 70 kg using 2.2.

How many kilograms is a stone?

One stone is 14 lb, which is 6.35 kg. Stone is still common in the UK and Ireland. To convert, multiply stones by 6.35, or convert to pounds first and then to kilograms.

How many cm is 5 feet 7 inches?

5 ft 7 in is 67 inches. Multiply by 2.54: 67 × 2.54 = 170.2 cm.

How do I convert mmol/L to mg/dL?

Multiply mmol/L by 18 (18.016 exactly). 7.0 mmol/L is 126 mg/dL, the fasting threshold for diabetes. To go the other way, divide mg/dL by 18.

What is a normal blood sugar in mg/dL and mmol/L?

A normal fasting glucose is 70–99 mg/dL (3.9–5.5 mmol/L). 100–125 mg/dL (5.6–6.9 mmol/L) is prediabetes, and 126 mg/dL (7.0 mmol/L) or higher is in the diabetes range. A diagnosis needs confirmed testing, not a single reading.

⚠️ For education and reference only. Use calibrated equipment, record the measurement site and unit, and follow your facility's protocols and escalation criteria. This page does not diagnose or interpret an individual's results.