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Epoxy River Table Calculator — Resin Volume, Pours & Cost

Get precise resin and hardener amounts for your river table project with pour scheduling

Total Epoxy Needed

2.57 gal

Fluid Oz

329.1 fl oz

Est. Cost

$115.20

Pours Needed

1

Deep-pour epoxy is typically 2:1. Table-top/coating epoxy is usually 1:1.

Epoxy Requirements

2.57 gal
total mixed epoxy (329.1 fl oz)
Resin
219.4 fl oz
1.71 gal
Hardener
109.7 fl oz
0.86 gal

Pour Schedule

Number of Pours1
Max Depth per Pour1/4" (0.25")
Epoxy per Pour329.1 fl oz
Wait Between Pours4–24 hours

Volume Breakdown

Channel Volume540.0 cu in
Raw Epoxy299.2 fl oz
With 10% Waste329.1 fl oz

Cost Estimate

Epoxy Cost$115.20
Typical Wood Slab Cost$200–$800
Total Project Estimate$515–$1,115

Pro Tips

Seal the wood: Apply a thin seal coat to the wood slabs before the main pour to prevent air bubbles from escaping into the epoxy.
Use a torch: Pass a propane torch quickly over the surface after pouring to pop surface bubbles. Do not linger—heat can yellow epoxy.
Temperature matters: Pour in a 70–80°F environment. Cold temps cause cloudy cures; hot temps cause too-fast exothermic reactions.

Example Calculations

15-Foot Dining Table — 6" Channel, 1.5" Deep (2:1 Ratio)

Inputs

Table Length60 inches
Channel Width6 inches
River Depth1.5 inches
Mix Ratio2:1 (Resin:Hardener)

Result

Total Mixed Epoxy1.60 gal (204.9 fl oz)
Resin136.6 fl oz (1.07 gal)
Hardener68.3 fl oz (0.53 gal)
Number of Pours6 (at 1/4" per pour)
Estimated Cost$71.73

Channel volume = 60 × 6 × 1.5 = 540 cu in. Raw fl oz = 540 × 0.554 = 299.2 fl oz. With 10% waste = 204.9 fl oz (after rounding). At 2:1 ratio: resin = 136.6 fl oz, hardener = 68.3 fl oz.

26-Foot Conference Table — 10" Channel, 2" Deep (2:1 Ratio)

Inputs

Table Length72 inches
Channel Width10 inches
River Depth2 inches
Mix Ratio2:1 (Resin:Hardener)

Result

Total Mixed Epoxy5.15 gal (658.9 fl oz)
Resin439.3 fl oz (3.43 gal)
Hardener219.6 fl oz (1.72 gal)
Number of Pours8 (at 1/4" per pour)
Estimated Cost$230.62

Channel volume = 72 × 10 × 2 = 1,440 cu in. Raw fl oz = 1,440 × 0.554 = 797.7 fl oz. With 10% waste = 877.5 fl oz ≈ 6.86 gal. At 2:1 ratio: 2/3 resin, 1/3 hardener.

Frequently Asked Questions

Q

How much epoxy do I need for a river table?

The amount depends on channel dimensions. A typical 60" × 6" × 1.5" river channel needs about 1.6 gallons (204 fl oz) of mixed epoxy with 10% waste factor. Volume = length × width × depth in cubic inches, then convert to fluid ounces (1 cu in = 0.554 fl oz).

  • 60" × 4" × 1.5" channel: ~1.1 gallons of mixed epoxy ($55–$70)
  • 60" × 6" × 1.5" channel: ~1.6 gallons of mixed epoxy ($80–$105)
  • 72" × 8" × 2" channel: ~3.5 gallons of mixed epoxy ($175–$230)
  • Always add 10% for waste, overflow, and seal coats
  • Deep-pour epoxy ($30–$50/gal) is cheaper per ounce than table-top epoxy ($45–$80/gal)
Channel Size (L×W×D)Volume (cu in)Epoxy (gal)Est. Cost
48" × 4" × 1.5"288~1.0 gal$35–$50
60" × 6" × 1.5"540~1.6 gal$80–$105
72" × 8" × 2"1152~3.5 gal$175–$230
84" × 10" × 2"1680~5.0 gal$250–$335
Q

How many pours does a river table need?

Most table-top epoxies require pouring in layers no thicker than 1/4 inch per pour to prevent overheating. A 1.5-inch-deep channel needs 6 pours with 4–24 hours between each. Deep-pour epoxy allows up to 2 inches per pour, reducing total pours significantly.

  • Standard table-top epoxy: max 1/4" per pour, 4–24 hours between pours
  • Deep-pour epoxy: max 1–2" per pour, 24–72 hours cure per layer
  • 1.5" river depth with standard epoxy = 6 separate pours over 2–6 days
  • 1.5" river depth with deep-pour epoxy = 1–2 pours total
  • Thicker pours risk exothermic reactions that can crack, yellow, or warp the wood
Q

What mix ratio should I use for epoxy river tables?

Deep-pour epoxy is typically mixed at a 2:1 ratio (2 parts resin to 1 part hardener by volume). Table-top/coating epoxy is usually 1:1. Always follow the manufacturer instructions exactly — incorrect ratios cause sticky, uncured resin.

  • 2:1 ratio (resin:hardener): standard for deep-pour epoxy like TotalBoat or Ecopoxy
  • 1:1 ratio: common for table-top epoxy used as a thin flood coat
  • Mix by volume, not weight, unless the brand specifies otherwise
  • Stir slowly for 3–5 minutes and scrape sides/bottom of the mixing container
  • Do not guess ratios — a tacky, uncured surface means wrong proportions
Q

How much does epoxy resin cost for a river table?

Epoxy resin costs $30–$80 per gallon depending on brand and type. A 6-foot river table with a 6-inch channel typically costs $80–$200 in epoxy alone. Budget epoxy runs $0.25–$0.35/fl oz while premium brands cost $0.40–$0.60/fl oz.

  • Budget deep-pour epoxy: $30–$45/gallon ($0.23–$0.35/fl oz)
  • Mid-range brands (TotalBoat, Ecopoxy): $45–$65/gallon ($0.35–$0.50/fl oz)
  • Premium UV-resistant epoxy: $60–$80/gallon ($0.47–$0.63/fl oz)
  • Pigments and dyes add $10–$30 per project
  • Total project cost (wood + epoxy + finish): $400–$2,000+
Q

How do I prevent bubbles in epoxy river tables?

Seal the wood slabs with a thin coat of epoxy first and let it cure. Use a propane torch or heat gun to pop surface bubbles after each pour. Pour in a warm (70–80°F) environment and mix slowly to minimize air entrainment.

  • Seal coat: thin epoxy layer on wood faces prevents air from escaping into the pour
  • Propane torch: quick passes 6–10" above surface pop bubbles within 20 minutes of pour
  • Temperature: 70–80°F prevents cold-related cloudiness and bubble trapping
  • Slow mixing: stir gently for 3–5 minutes to avoid whipping air into the resin
  • Pressure pot: for small pours, 40–60 PSI eliminates micro-bubbles completely

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Last Updated: Mar 9, 2026

This calculator is provided for informational and educational purposes only. Results are estimates and should not be considered professional financial, medical, legal, or other advice. Always consult a qualified professional before making important decisions. UseCalcPro is not responsible for any actions taken based on calculator results.

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