Easy Epoxy Calc

How much epoxy for a 200 cm river table?

Short answer

You need about 28.3 liters of mixed epoxy for a 200 cm river table with a river averaging 25 centimetres wide on 5-centimetre slabs; the 25.8 liters that ends up in the table weighs roughly 28.3 kilograms.

How to work it out

  1. 200 cm × 25 cm × (5 cm + 1.5 mm proud) = 25,750 cm³ = 25.8 L
  2. + 10% waste = 28.3 L → 3 × 12 L kits
  3. Lifts: 5.15 cm ÷ 5 cm per layer → 2 lifts of 2.58 cm and 14.2 L each
  4. Batches: 14.2 L per lift ÷ 12 L (one whole kit) → 2 per lift × 2 lifts → A 4.72 L (5.43 kg) + B 2.36 L (2.29 kg) each
  5. Mix ratio 2 : 1 by volume, SG A 1.15 / B 0.97 (typical, not published by the maker — type your data sheet’s SGs for exact weights) → Part A 18.9 L (21.7 kg) + Part B 9.44 L (9.16 kg)

A 2 m table with 5 cm slabs is a serious pour: 200 × 25 × 5 = 25,000 ml of channel, plus 750 ml for the 1.5 mm poured proud. Tables this long typically seat eight and are around 100 cm wide, and the slabs are heavy enough that you will want a second person to set them in the form.

Adjust for your project

cm
cm
Measure across the gap, not the whole table — the diagram just below the calculator shows where.
cm
Your slab thickness at the thickest spot. About 1.5 mm extra, so you can sand it flat, is added for you (“Pour proud” under More options). Many deep-pour resins also have a minimum depth — often 5 cm.
cm
On the label as “max pour depth”. Not bought yet? Leave 5 cm — many deep-pour epoxies allow 2.5–5 cm per layer.
Total of both bottles together (e.g. 2 L + 2 L = 4). Sold by weight? Pick “Another size” and enter the kg ÷ 1.1 as liters (roughly).
More options: waste · proud · product …
%
Cup and bucket film, small leaks, the seal coat on the live edges. Use 15% for very open or punky wood.
mm
Resin poured above the wood so the whole top can be sanded flat — about 1.5 mm is typical. Enter 0 if you already added it to the depth.
Fills in the mix ratio, weights and depth limits from the maker’s published data, and hides those fields. Always check the data sheet that comes with your batch.
cm
From the label — e.g. MAS Deep Pour X 5 cm, FlowCast 1.3 cm
L
Some labels lower the deepest layer for big pours, or cap the volume per layer. Enter that volume here; leave blank if your label doesn’t.
ml
Open knots and cracks that join the river fill up too. A rough guess is fine: a 2 × 2 × 8 cm knot holds about 32 ml.
Only changes the Part A / Part B split — it’s printed on the kit. Tabletop and art resins are usually 1:1; deep pour often 2:1.
From the TDS, in g/ml. Leave blank for 1.15 (typical, not published by the maker).
From the TDS, in g/ml. Leave blank for 0.95 on 1:1 kits or 0.97 on other ratios (typical, not published by the maker).
L
Resin + hardener mixed in one bucket. Leave blank to mix one whole kit at a time; enter less (1.5 gal or 6 L is easy with a drill paddle) to split each lift into batches you pour back to back.
From the label: when the next layer can go on (the recoat window) at room temperature. Leave blank to skip the pour schedule.
From the label: how long after the last pour before the table can come out of the form.
$
Optional — your kit price, for a cost estimate
Deep-pour epoxy to buy28.3 L7.48 gal
In short
Buy 3 × 12 L deep-pour kits. Pour the river in two layers of about 2.58 cm, mixing two batches for each.
Pours (lifts) needed
2 pours
Depth of each lift
2.58 cm
Mixed epoxy per lift
14.2 L (3.74 gal)
What the resin will weigh in the table (for the form and legs)
28.3 kg (62.4 lb)
Left over from the last kit
7.68 L (2.03 gal)
Mixing details: batches, Part A and Part B
Mixing details: batches, Part A and Part B
Part A (resin)Part B (hardener)
Each batch (4 in all, 2 per lift)4.72 L · 5.43 kg2.36 L · 2.29 kg
Whole job18.9 L · 21.7 kg9.44 L · 9.16 kg
  • What to buy: 3 × 12 L deep-pour epoxy kits. Each kit has both bottles (resin + hardener) — you don’t buy them separately.
  • Check the label’s minimum depth too. Many deep-pour resins list a minimum pour as well as a maximum — MAS Deep Pour X, for one, wants at least 2 in, and thinner pours cure slowly or stay soft. At 2.58 cm per lift, choose a resin whose range includes that depth, and type its minimum under Min depth per pour (More options) to check.
  • Your depth is more than one pour can handle — plan 2 lifts of about 2.58 cm, letting each reach the label’s recoat window before the next. The depth limit set this: 5.15 cm ÷ 5 cm per layer, rounded up.
  • Only the 1.5 mm you pour proud takes this past 5 cm — the slabs themselves are 5 cm. If your label has headroom (check the data sheet), one pour to the slab tops plus a thin top-up later also works.
  • Mix 2 batches of about 7.08 L for each lift and pour them back to back into the same layer, before they start to thicken. Some labels also cap the mass per pour — check yours.
  • Seal the live edges and any bark with a thin coat first — dry wood soaks up epoxy and releases bubbles into the pour.
  • About 7.68 L will be left in the jugs. Kept sealed, it fills knots and cracks later, or makes a practice river board.

For this job · affiliate link
Deep pour epoxy, 3-gallon-plus kitYou need 28.3 L — 3 × 12 L kits. Bigger deep-pour kits are usually cheaper per liter than a stack of small ones. Pick one whose label range includes 2.58 cm per pour — the minimum as well as the maximum.
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200 cm river table epoxy by average river width (200 cm long, 5 cm slabs)

200 cm river table epoxy by average river width (200 cm long, 5 cm slabs)
Average river widthDeep-pour epoxy to buyKits to buyWhat the resin will weigh in the table (for the form and legs)
20 cm22.7 L2 kits22.7 kg
25 cm28.3 L3 kits28.3 kg
30 cm34 L3 kits34 kg
35 cm39.7 L4 kits39.7 kg

What to know about a 200 cm river table

Lifts. Five centimetres is at or near the per-pour limit of many deep-pour resins, and the 1.5 mm poured proud takes this one to 5.15 cm. With the calculator’s default 5 cm limit that means two lifts (separate layers) of about 2.58 cm and 14.2 liters each, the second poured once the first reaches the label’s recoat window. MAS Deep Pour X, rated for 2–3 in (about 5–7.5 cm) per pour, takes it in one; a product rated for 2.5 cm needs three lifts of about 9.44 liters.

Buying versus keeping. You buy 28.3 liters, but only the 25.8 liters in the channel stays in the table; the rest is cup film, leaks and seal coat. At a typical 1.1 kg per liter, the resin in the finished top weighs roughly 28.3 kg. Add solid-wood slabs of this size and the top becomes at least a two-person lift, so pour it close to where it will be flattened and finished.

Kits and leftovers. Three 12 L kits leave about 7.68 L. One 30 L kit leaves only about 1.68 L — a tight fit the calculator flags, because a single leaking seam can use that up. The spare from the 12 L kits is enough for a practice piece — see How much epoxy for a river charcuterie board, which takes a little over a liter.

For a shorter metric table, see How much epoxy for a 180 cm river table. The nearest imperial page, How much epoxy for an 8 ft river table, is a longer table: 96 in is about 244 cm.

Different size? Use the full River Table Epoxy Calculator.

What you’ll need

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Frequently asked questions

How many pours for a 200 cm river table with epoxy rated for 2.5 cm?

3 pours of about 9.44 liters each, for the same 28.3 L in total.

How much epoxy for a 200 cm river table with a 30 cm river?

About 34 liters with 10% waste (30.9 L of channel) — 3 kits of 12 L.

Is one 30 liter kit enough for a 200 cm river table?

Only just: 1 kit of 30 L covers the 28.3 liters with 1.68 L over. That is a tight fit — add a small kit if the slabs are bare or this is your first river.

Other common sizes

Sources