IV fluid prescription (by body weight) for routine maintenance over a 24‑hour period

According to "Intravenous fluid therapy in adults in hospital" by NICE

Body weight	Water	Sodium, chloride, potassium
kg	25–30 ml/kg/day	approx. 1 mmol/kg/day of each
40	1000–1200	40
41	1025–1230	41
42	1050–1260	42
43	1075–1290	43
44	1100–1320	44
45	1125–1350	45
46	1150–1380	46
47	1175–1410	47
48	1200–1440	48
49	1225–1470	49
50	1250–1500	50
51	1275–1530	51
52	1300–1560	52
53	1325–1590	53
54	1350–1620	54
55	1375–1650	55
56	1400–1680	56
57	1425–1710	57
58	1450–1740	58
59	1475–1770	59
60	1500–1800	60
61	1525–1830	61
62	1550–1860	62
63	1575–1890	63
64	1600–1920	64
65	1625–1950	65
66	1650–1980	66
67	1675–2010	67
68	1700–2040	68
69	1725–2070	69
70	1750–2100	70

Body weight	Water	Sodium, chloride, potassium
kg	25–30ml/kg/day	approx. 1 mmol/kg/day of each
71	1775–2130	71
72	1800–2160	72
73	1825–2190	73
74	1850–2220	74
75	1875–2250	75
76	1900–2280	76
77	1925–2310	77
78	1950–2340	78
79	1975–2370	79
80	2000–2400	80
81	2025–2430	81
82	2050–2460	82
83	2075–2490	83
84	2100–2520	84
85	2125–2550	85
86	2150–2580	86
87	2175–2610	87
88	2200–2640	88
89	2225–2670	89
90	2250–2700	90
91	2275–2730	91
92	2300–2760	92
93	2325–2790	93
94	2350–2820	94
95	2375–2850	95
96	2400–2880	96
97	2425–2910	97
98	2450–2940	98
99	2475–2970	99
100	2500–3000	100
>100	2500–3000	100

Add 50–100 grams/day glucose (e.g. glucose 5% contains 5g/100ml).

For special considerations refer to the recommendations for routine maintenance.

Weight-based potassium prescriptions should be rounded to the nearest common fluids available (for example, a 67 kg person should have fluids containing 20 mmol and 40 mmol of potassium in a 24-hour period). Potassium should not be added to intravenous fluid bags as this is dangerous.

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