If the Zone formula yields a decimal, what rounding options are allowed?

• A. Only round up.
• B. Only round down.
• C. Round up or round down.
• D. Do not round at all.

Answer: (C)

When using the Zone formula, you end up with whole-number blocks for practical meal planning. If the calculation comes out as a decimal, you convert it to a whole block count because partial blocks aren’t used in daily planning. You can round the decimal either up or down, giving you flexibility to fit your overall daily targets. For example, 5.4 blocks could be rounded down to 5 or rounded up to 6, depending on how you want to balance your intake across the day. Not rounding at all would leave a decimal that isn’t usable for block counting, and always rounding in one direction could bias intake, so allowing either direction is the intended approach.