Sweet potato
A sweet potato is the edible, starchy root of the plant Ipomoea batatas, widely grown for food.
Also known as: sweetpotato, Ipomoea batatas root
How big is it?
15 cm long
Also 5.906 in
Defined whole-root length · defined specimen
Typical recorded range: 10 cm to 25 cm.

A little perspective
About the same scale as Human brain.
Human brain: The human brain is the organ that processes sensory information and coordinates thought, memory, movement and many body functions.
Measurements, assumptions & sources +
Sweet potato
A defined whole sweet-potato storage root 15 cm long and 250 g. Cultivar and growing conditions vary; the tapered root body is measured without fine roots, leaves or cut surfaces.
USDA FoodData Central — raw fruit portions
The marked defined whole-root length is calibrated. Unmeasured illustration details are representative.
Human brain
A defined adult-brain specimen 15 cm front to back and 1.4 kg. Brain size and mass vary by person; these values are comparison anchors, not health benchmarks.
Defined examples — our methodology
The marked representative front-to-back length is calibrated. Unmeasured illustration details are representative.
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Why this measurement?
Why we use 15 cm
For comparison, this page uses defined whole-root length. This is labelled defined specimen: an explicit comparison model rather than a claim that every example has the same value. The recorded range is 10 cm to 25 cm.
A defined whole sweet-potato storage root 15 cm long and 250 g. Cultivar and growing conditions vary; the tapered root body is measured without fine roots, leaves or cut surfaces.
The marked horizontal span follows the named feature; transparent margins and unmeasured details do not alter it. How calibrated comparisons work →
Recorded properties
Sweet potato dimensions and measurements
| Property | Selected value | Recorded range | Basis |
|---|---|---|---|
| 15 cm | 10 cm to 25 cm | defined specimen | |
| 250 g | 150 g to 450 g | defined specimen |
Around this scale
Go smaller. Go bigger.
These links use compatible length records, ordered around the selected value.
Nearest lower value · Everyday thingsA6 paper14.8 cmA6 paper is an ISO 216 paper format commonly used for postcards, small flyers and pocket stationery.
Around the same scale · Everyday thingsSmartphone15 cmA smartphone is a portable electronic device that combines mobile phone functions with internet access and apps.
Nearest higher value · Everyday thingsBroccoli head16 cmA broccoli head is the compact, edible crown of the broccoli plant, consisting of clustered green flower buds.Sources and method
Want to check the number?
The source records and measurement method remain available for inspection.
- USDA FoodData Central — raw fruit portionsReference serving masses for raw fruits; dimensions remain explicit atlas specimen choices.
There’s always another scale






