Live calculator

Dextrose dose & dilution calculator

Estimate dextrose bolus math or fluid-bag dextrose concentration math using visible percent-solution arithmetic. This tool is arithmetic support only and does not recommend a dextrose protocol or treatment plan.

In bolus mode, the calculator converts g/kg into total grams and stock volume. Add a dilution target only when you want a diluted final volume shown.

Arithmetic support only. Does not recommend route, dilution strategy, or whether dextrose is indicated.
Safety checks
  • Arithmetic support only.
  • This tool does not recommend whether dextrose support is indicated.
  • Review final concentration, route, and delivery context carefully before using a hypertonic dextrose result.
Basis and limits
  • Calculation basis: bolus mode converts g/kg into total grams and stock volume; bag mode converts a target final percent into stock volume to add and optional grams per hour.
  • Scope: this tool supports dextrose arithmetic. It does not choose route, dilution strategy, indication, or a treatment protocol.
  • Before use: verify the stock concentration, final delivery setup, line choice, and current case plan against protocol and product labeling.
  • Clinical use: bolus-dilution math and bag-concentration math remain separate workflows and should be matched to the actual setup being prepared.
Formula audit trail

Calculation steps will appear here for verification.

Worked example and practice

Worked example

A 10 kg dog needs a 0.25 g/kg dextrose bolus from a 50% stock solution.

Total dose = 10 kg x 0.25 g/kg = 2.5 g Stock volume = 2.5 / (50 / 100) = 5 mL

The arithmetic answer is 5 mL of 50% dextrose before any separate decision about dilution, route, or line selection.

Try this case

Estimate the answer before revealing it: how much 50% dextrose stock is needed to make a 1 L bag into 2.5% dextrose?

Reveal worked answer

Stock to add = 1000 x 2.5 / 50 = 50 mL.

Total dextrose in the bag = 1000 x 2.5 / 100 = 25 g.

If you want the final bag concentration to stay exact, remove 50 mL of base fluid before adding the stock.