1g Scale

A 1-gram scale is a kitchen balance with a display increment of 1 gram and, typically, a maximum capacity between 3 and 5 kilograms. It is the workhorse precision tier for dietary logging: large enough to weigh whole meals, large enough to weigh bulk ingredients before portioning, small enough to be cheap and countertop-sized.

Capability envelope

A 1 g scale used well covers most of the dietary-logging use case:

• Whole-meal weighing. Pre- and post-cooking meal weights, for yield and portion calculations.
• Bulk ingredient portioning. Rice, pasta, vegetables, meat cuts, cheese, most produce — anything typically measured in quantities above 20 grams.
• Batch recipe tracking. Summing ingredient weights into a batch recipe, then dividing by portions to derive per-serving figures.

What it cannot do well: weigh small items (oils by the gram, spices, nuts individually, small supplements). For those, a 0.1 g scale is the tool. A careful tracker owns both.

Typical accuracy

Consumer-grade 1 g scales from reputable manufacturers, when new and calibrated, achieve accuracy within ±1 g across their range — roughly 0.03 per cent at full load, 1 per cent at 100 g, unacceptable at 10 g. A 2021 comparative review in Consumer Reports-style product testing found typical out-of-box accuracy of eight common kitchen scales to be within the manufacturer's specification on all but one; repeatability was better than the readability on most units.

Operational practice

Four operational practices measurably improve logging accuracy with a 1 g scale:

• Consistent tare. Always tare with the final container in place. Do not weigh in one container and transfer to another.
• Level surface. Load cells are sensitive to tilt. A scale on a wobbly benchtop will drift.
• Room-temperature equilibration. Cold items (refrigerated, frozen) condense atmospheric moisture on the scale platform, adding phantom grams. Let items warm slightly before weighing where precision matters.
• Periodic calibration check. A 500-g calibration weight is inexpensive. A monthly spot-check against it detects drift before it becomes a systematic logging error.

Scale choice in the broader logging method

A user logging meals on a 1 g scale with current USDA database entries can achieve total-logging MAPE in the 2 to 4 per cent range against laboratory references — better than nearly any other consumer logging method. The limits on further improvement are database staleness (not scale precision) and the residual error on small ingredients that the 1 g scale cannot resolve. For users motivated enough to weigh, the 1 g scale is typically the constraint that does not bind; the constraint that binds is logging friction over time.