**One common problem encountered by medical students, nursing students and sometimes even to practicing doctors is intravenous (iv) fluid calculation.**

**There may be various ways to determine how much maintenance fluid to be given intravenously, however the author will discuss here one commonly practiced technique practiceed by certain medical practitioners.**

**First you should be oriented with the formula depicted below in the diagram –**

**To explain the above diagram –**

**-For body weight of first 10 kgs we give 100 ml/ kg / day.**

**-For the next 10 kgs we give 50 ml / kg / day.**

**-Finally, for the remaining body weight i.e. for those weighing more than 20 kgs we give in the rate of 20 ml / kg / day.**

**For easy calculations it’s good to memorize the amount of iv fluids which might be needed for an individual weighing 10 and 20 kgs.**

**For a 10 kg person iv fluid required is 10×100 =1000**

**For a 20 kg person iv fluid requirement is –**

** 1000 + (10×50)= 1500.**

**If you remember the above two values you can easily derive iv fluid requirements for various body weights more than 10 and 20 kgs.**

**Now let us consider some examples –**

**For a 8 kg child- 8×100= 800 ml per day.**

**For a 12 kg child – 1000+ (2×50) = 1100 ml per day.**

**For a 30 kg individual – 1500+ (10×20)= 1700 ml per day.**

**Lastly, how to determine how much iv fluid to be given in each hour. For this simply divide ➗ the calculated total fluid requirement per day by 24; since 24 hours makes a day.**

**The above writing is a simplified version for iv fluid requirement calculation made by the author which may not be free from errors. Hence, please cross check the information from reliable sources. ⚠**

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