Hyponatremia Volume Expansion Table

For Educational Use Only. Please do not apply these calculations without first verifying they are applicable and accurate for the clinical context.

Proportion of NS / (0.5NS + KCL)	Tonicity with 0 K Added to 0.5NS (mmol/L)	Tonicity with K20 Added to 0.5NS (mmol/L)	Tonicity with K40 Added to 0.5NS (mmol/L)
0/100	77	97	117
10/90	85	103	121
20/80	92	108	124
30/70	100	114	128
40/60	108	120	132
50/50	116	126	136
60/40	123	131	139
70/30	131	137	143
80/20	139	143	147