How Much Sugar or Honey? Wine and Mead Calculator

Enter the volume and the gravity you have now, then the alcohol or gravity you want. The result is the sugar or honey to add and the volume you end up with.

How it’s worked out

An exact mass balance

Brix is the mass percentage of dissolved sugar, so the amount follows from a balance, not from a rule of thumb. The must weighs V × SG × 998.203 g. To go from Brix B0 to B1 with a sweetener that is a fraction f sugar: grams = must mass × (B1 − B0) / (100 × f − B1). Sugar is f = 1; honey is f = 0.828, because average honey is 17.2 % water.

The common “1.000 to 1.090 needs a fixed amount per gallon” rules ignore that the sugar also adds volume. For 1 L of water to 1.090 the balance gives 275 g of sugar and 1.17 L of must.

From potential alcohol to gravity

Potential alcohol is fermentable sugar ÷ 16.83 g/L, the OIV and EU convention. For grape and fruit musts the gravity that holds that much sugar comes from OIV Table II, because juice carries other solids too. For mead and sugar wine it comes from the sugar itself: honey is about 94 % fermentable sugar by solids.

For grape musts already on the OIV table (from 1.041), the sugar is worked out with the OIV chaptalisation formula, which also counts the volume the sugar adds.

Above the target already

If the must is already above the target, the calculator tells you how much water brings it down instead. Water dilutes everything else too: acid, colour and flavour.

Honey in steps

A strong mead starts more easily below about 1.110. Many makers add part of the honey later, in two or three steps. The ABV calculator counts those additions, and the mead guide walks through it.

Sources

Doses are estimates. Add in steps, test again, follow the product label. For personal use only.

Checked against the sources: October 25, 2026

How much sugar or honey to add

Result