---
title: "Mattress Spring Count Explained"
description: "Plain guide to spring count on UK pocket sprung and hybrid mattresses — why size matters and why count is not firmness."
url: "https://bedguide.co.uk/mattresses/spring-count-explained/"
category: "mattresses"
primary_entity: "mattress spring count"
date_published: 2026-08-03
date_modified: 2026-08-03
---

# Mattress Spring Count Explained

> Spring count is the number of springs in a stated mattress size. On pocket sprung beds it mainly shows packing density, not firmness alone. Always read count with size: one thousand springs in a Single is denser than one thousand in a Super King. Wire gauge, zoning and comfort layers still govern support and durability.

## Key facts

- Materials: steel pocket springs, fabric pockets
- Typical lifespan: 7–10 years

## Count depends on mattress size

Shop listings quote spring count for a specific size. When comparing:

1. Note the **mattress size** attached to the count.
2. Prefer **springs per m²** when sizes differ.
3. Ask whether the count includes **micro-coils** stacked above the main unit.

## Pocket vs open coil counts

| Construction | Typical count pattern | What count mainly reflects |
| --- | --- | --- |
| [Pocket sprung](/mattresses/pocket-sprung) | Hundreds to thousands | How densely pockets are packed |
| [Open coil / Bonnell](/mattresses/open-coil-bonnell) | Often ~300–500 | Larger linked coils |
| [Hybrid](/mattresses/hybrid-construction) | Pocket counts plus foam specs | Spring density and comfort chemistry |

## Gauge and zoning matter as much as count

- **Wire gauge** — thicker wire generally resists permanent set longer under load.
- **Zoning** — firmer coils under hips, softer under shoulders, changes alignment
  feel without changing the headline count.
- **Comfort layers** — wool, foam or latex above the unit dominate the first
  centimetres of feel.

## Related BedGuide entries

- [How spring count is marketed](/mattresses/how-spring-count-is-marketed)
- [How to read a mattress spec](/mattresses/how-to-read-a-mattress-spec)
- [Pocket sprung construction](/mattresses/pocket-sprung)
- [Firmness and sleep position](/mattresses/firmness-and-sleep-position)
- [Pocket sprung vs open coil](/compare/pocket-sprung-vs-open-coil)

## Frequently asked questions

### Does a higher spring count mean a firmer mattress?

Not necessarily. Firmness depends on wire gauge, coil shape, comfort fillings and foam hardness. A high-count unit with soft padding can feel softer than a lower-count unit with firm fillings.

### What spring count should a pocket sprung mattress have?

UK retail education often treats counts below about 600 in adult sizes as basic. Many guides suggest looking at 1,000+ in Double or King classes. Density per square metre and materials matter more than one magic number.

### Why do open coil mattresses show lower spring counts?

Open-coil Bonnell units use larger linked coils, so total counts are often a few hundred rather than thousands. Compare construction type first, then count within the same type and size.

---

Source: https://bedguide.co.uk/mattresses/spring-count-explained/ · BedGuide — educational encyclopedia, no affiliate commission. Facts checked against official sources where possible; see https://bedguide.co.uk/editorial-policy. Report an error: https://bedguide.co.uk/corrections.