A small Red Bull, typically the 8.4 fl oz (250 ml) can, contains 80 mg of caffeine.

Caffeine by Size

Red Bull's caffeine scales with can volume at roughly 9.5 mg per ounce across sizes.

Can Size| Volume| Caffeine (mg)
---|---|---
Small (Standard)| 8.4 oz (250 ml)| 80 135
Medium| 12 oz (355 ml)| 114 13
Large| 16 oz (473 ml)| 151 13
Extra Large| 20 oz (591 ml)| 189-198 135

This matches a standard cup of coffee (~80-100 mg), but energy drinks hit faster due to carbonation and taurine.

Comparisons & Facts

  • Vs Coffee : Similar to 6-8 oz brewed coffee; espresso shot (~63 mg) is slightly less.
  • Sugar-Free/Editions : Same 80 mg in 8.4 oz versions—flavor doesn't alter caffeine.
  • Daily Limit : FDA suggests 400 mg max for adults; one small Red Bull is 20% of that.
  • Consistent globally, though EU "small" cans are often this exact size.

Quick Tips

Stay under 2-3 cans daily if sensitive, as excess (>200 mg/session) risks jitters or sleep issues. Pair with food for steady energy, not on empty stomach.

TL;DR : 80 mg in a small 8.4 oz Red Bull—boost without overkill.

Information gathered from public forums or data available on the internet and portrayed here.