The four-way comparison everyone needs
You have four main choices when buying laundry detergent today: liquid in a plastic jug, pods in a plastic tub, powder in a cardboard box, and strips in a paper envelope. Each format is sold in both conventional and eco-friendly versions. Here is a head-to-head on what actually matters.
Cost per wash comparison
Based on current retail prices (US, 2026):
- Laundry powder (eco): $0.10-$0.18 per wash
- Laundry liquid (eco concentrate): $0.10-$0.20 per wash
- Laundry strips: $0.20-$0.32 per wash
- Laundry pods/capsules: $0.22-$0.38 per wash
Powder is consistently the cheapest format, especially in larger sizes. Pods are the most expensive. Strips sit between the two — more than powder, less than pods.
Cleaning power: real-world results
Liquid detergent has the best reputation for pre-treating stains because you can apply it directly. Plant-based liquid formulas (like Seventh Generation or Ecover) clean everyday loads excellently. They can struggle slightly with heavy grease without pre-treatment.
Powder often contains optical brighteners and oxygen-based stain lifters that are not easily incorporated into liquid formulas. For whites and heavily soiled loads, powder often outperforms liquid. Eco powders (like Eco Egg Laundry Powder or Bio-D) work well but some lack brighteners.
Pods are exactly as clean as whatever formula is inside them — the PVA capsule just delivers a measured dose of liquid concentrate. Their advantage is preventing overuse, which means consistent results. Their disadvantage is cost and plastic film.
Strips perform well on light-to-medium soil and are comparable to mainstream liquid for everyday loads. On heavy grease or protein stains, a pre-treatment spray bridges the gap. Cold-water performance is notably good.
Environmental impact
Here is where the formats diverge sharply.
Liquid detergent is the worst eco format: it is 70-80% water that you pay to ship in a plastic jug that is rarely recyclable due to residue contamination. Buying concentrated liquid in glass or aluminium is better, but the format is fundamentally inefficient.
Powder is genuinely good: low water content, cardboard packaging (recyclable, compostable), and some formulas contain no added fragrances or synthetic dyes. This is the underrated eco winner in the mainstream market.
Pods present a dilemma. PVA film is technically biodegradable, but studies have found it passes through water treatment facilities and accumulates in the environment. The plastic tub container is usually not recycled. Eco pods in compostable packaging are better but not widely available.
Strips are the most eco-friendly format by volume and packaging: a 64-load pack weighs 90g and ships in cardboard. They use concentrated plant-based surfactants and essentially eliminate plastic from your laundry routine. The eco premium per wash is real but shrinking as competition increases.
HE machine compatibility
All four formats come in HE-compatible versions. Look for the HE symbol on powder and liquid. Strips and pods are inherently HE-compatible (low suds). Standard non-HE powder or liquid used in HE machines will cause excess suds and can damage the machine over time.
Convenience comparison
- Pods: Highest convenience — pre-dosed, no measuring, just toss in the drum
- Strips: Very convenient — tear and toss, no measuring, compact storage
- Liquid: Convenient for pre-treating, messy measuring required, bulky to store
- Powder: Least convenient — scooping, potential clumping, can't pre-treat easily
Our verdict by priority
Best eco choice: Laundry strips or eco powder in cardboard. Strips win on plastic, powder wins on cost.
Best value: Eco powder in economy size. Lower cost per wash than any other format with comparable performance.
Best for convenience: Pods or strips. Both are pre-dosed and mess-free.
Best for tough stains: Liquid concentrate (for pre-treating) or powder (for whites and heavy soil).
Best all-round switch from conventional liquid: Laundry strips. The eco gains are significant, performance is solid for everyday loads, and the behaviour change is minimal.
The bottom line
There is no single perfect laundry format for everyone. If cost matters most, buy eco powder in a cardboard box. If plastic-free matters most, switch to strips. If you just want something that works reliably with zero faff, eco pods in compostable packaging are a reasonable choice. The main thing to avoid: liquid detergent in a standard plastic jug with no recycled content — it is the worst of every metric.
