Phone Case Resin Calculator
Calculate exact resin for custom phone cases and coating projects.
Supports iPhone, Samsung, and custom phone dimensions.
No sign-ups. Instant results.
💡 Tip: Use clear phone cases for coating method. Apply clear epoxy resin in thin layers.
Example calculation
Let's calculate resin for coating an iPhone 15 case:
| Parameter | Value |
|---|---|
| Phone model | iPhone 15 / 15 Pro (6.1") |
| Case dimensions | 147mm × 72mm |
| Case method | Coating (resin on clear case) |
| Coating thickness | 1.5mm |
| Quantity | 1 case |
| Add 15% buffer | Yes |
| Total resin needed | 18 ml (or 19 grams) |
Calculation: 147mm × 72mm × 1.5mm × 0.85 (coverage area) = 13,432 mm³ = 13ml + 15% = 18ml
Common phone models & resin amounts
| Phone Model | Screen Size | Coating Method | Full Pour Method |
|---|---|---|---|
| iPhone SE / 8 | 4.7" | 15ml (17ml w/ buffer) | 55ml (63ml w/ buffer) |
| iPhone 15 / 14 / 13 | 6.1" | 18ml (21ml w/ buffer) | 70ml (81ml w/ buffer) |
| iPhone 15 Pro Max | 6.7" | 22ml (25ml w/ buffer) | 85ml (98ml w/ buffer) |
| Samsung Galaxy S24 | 6.2" | 19ml (22ml w/ buffer) | 72ml (83ml w/ buffer) |
| Samsung S24 Ultra | 6.8" | 24ml (28ml w/ buffer) | 90ml (104ml w/ buffer) |
💡 Coating method is most popular - uses 3-4× less resin than full pour
Resin phone case making tips
📱 Use coating method
Buy clear plastic cases, pour thin resin layer on back. Cheaper, more durable, and easier than full pour molds.
🎨 Create depth with layers
Pour base color, wait 4-6 hours, add flowers or foil, top with clear. Prevents embeddings from sinking.
☀️ Use UV-resistant resin
Phone cases get sun exposure. UV-resistant epoxy prevents yellowing. Regular resin turns yellow in 6-12 months outdoors.
🔧 Test fit before curing
Make sure case still fits phone after resin layer. 1-2mm coating doesn't affect fit. Thicker layers (3mm+) may prevent case from snapping on.
🛒 Shop supplies: Clear Cases • UV-Resistant Resin • Alcohol Ink
Coating vs Full Pour methods
Coating Method (Recommended for Beginners)
How it works: Buy clear plastic phone cases, pour 1-2mm layer of resin on the back, add your design (colors, glitter, flowers, foil), let cure 24-48 hours. The plastic case provides structure and protection, resin adds decoration.
Pros: Uses less resin (15-25ml per case), more durable (plastic backing), easier for beginners, faster production, guaranteed to fit phone properly, lower material cost ($3-5 per case).
Cons: Must buy blank cases first, can only decorate back (not sides), limited by case design.
Full Pour Method (Advanced)
How it works: Use silicone molds shaped for specific phone models, pour entire case from resin (60-100ml per case), requires multiple pours for sides and back, must embed button covers and camera cutouts, cure 48-72 hours.
Pros: Complete creative control, can make transparent cases, unique designs, no need to buy blank cases, premium pricing potential ($50-80).
Cons: Uses 3-4× more resin, harder to get perfect fit, more fragile than plastic-backed cases, requires precise molds, longer production time, higher material cost ($8-12 per case).
💡 Recommendation: Start with coating method. Once you're comfortable with resin techniques and have established customers, experiment with full pour for premium custom orders.
Phone case custom orders & pricing
Material costs per case (coating method)
Clear case: $1-2 (buy bulk packs of 10+ for $1 per case)
Resin: $1-2 (20ml at $0.04-0.08/ml)
Colorants: $0.50-1 (mica powder, alcohol ink)
Embellishments: $0.50-2 (dried flowers, gold foil, glitter)
Packaging: $0.25-0.50 (cellophane bag or box)
Total materials: $3.25-7.50 per case
Labor & time
Prep & pour: 15-20 minutes per case
Curing time: 24-48 hours (passive - no labor)
Finishing: 5-10 minutes (remove drips, polish edges, package)
Total active time: 20-30 minutes per case
Labor cost: $5-10 at $15-20/hour
Pricing strategy
Total cost: $8-17 per case (materials + labor)
Recommended retail: $28-50 (3-4× markup)
Custom designs: $40-60 (names, photos, special requests)
Batch orders: $25-35 per case (5+ cases, labor savings)
Use our Resin Cost Calculator to determine exact costs and optimal pricing for your designs. Track actual time spent and adjust pricing as you gain efficiency.
Popular custom options that command premium prices
- Photo phone cases: $40-55 (embed customer photos in resin)
- Name/initial cases: $35-50 (custom text in gold foil or paint)
- Birthstone colors: $30-45 (matching customer's birth month)
- Pet memorial cases: $50-75 (pet photo or fur inclusion)
- Wedding/couple cases: $45-65 (matching designs, initials, dates)
- Pressed flower cases: $35-55 (real flowers preserved in resin)
Phone case resin calculator FAQs
How much resin do I need for a phone case?
For coating method (most common): 15-25ml per phone case depending on size. iPhone standard models (15, 14, 13) need about 18-20ml, larger Pro Max models need 22-25ml. For full pour mold method, multiply by 3-4× for thicker structural cases (60-100ml per case). Always add 10-15% buffer for waste, drips, and mixing cup residue.
What is the best method for making resin phone cases?
Coating method is most popular and beginner-friendly: buy clear plastic phone cases, pour thin resin layer on back (1-2mm), add your design, cure 24-48 hours. Full pour method uses silicone molds to create entire case from resin but requires precise dimensions, more resin, and is harder for beginners. Coating method costs less ($3-5 vs $8-12 materials), has better durability (plastic backing), and guaranteed fit.
Can I make phone cases with regular epoxy resin?
Yes, but use UV-resistant clear epoxy resin designed for casting. Regular epoxy yellows within 6-12 months from sunlight and phone heat. UV resin works for very thin coatings (under 1.5mm) but won't cure properly in thicker pours. Table top epoxy works well for coating method (1-2mm layers). Cure time is 24-72 hours for full hardness. Never use polyester resin—it's too brittle.
How do I price custom resin phone cases?
Material cost is $3-6 per case: clear case $1-2, resin $1-2 (20ml), colorants/embellishments $1-2. Add labor cost $5-10 for 30-45 minutes work (mixing, pouring, finishing, packaging). Total cost $8-16. Sell for $28-50 using 3-4× markup for 67-75% profit margins. Custom designs with photos or names command premium prices $40-60. Use our Resin Cost Calculator for exact profitability analysis.
Are resin phone cases durable?
Yes, when made properly. Coating method (resin on clear plastic case) is most durable because the plastic case provides structural support and drop protection while resin adds decoration. Full resin cases are more fragile and can crack on drops. Always cure fully (72 hours minimum) before use. Resin layer should be 1-2mm thick— thicker layers reduce flexibility and may prevent case from fitting. Use UV-resistant resin to prevent yellowing.
How do I add photos to resin phone cases?
Print photos on regular paper, seal with Mod Podge or clear packing tape to prevent ink bleeding. Let dry completely (2-4 hours). Pour thin base layer of clear resin on case (0.5mm), place sealed photo face-up, press gently to remove bubbles, pour final clear resin layer on top (1mm). Total thickness 1.5-2mm. Cure 24-48 hours. Always test photo sealing method on scrap paper first.
What phone models are most popular for custom cases?
iPhone models dominate: iPhone 15 / 15 Pro (6.1"), iPhone 15 Pro Max (6.7"), iPhone 14, and iPhone 13 series. Together they represent 70-80% of custom case orders. Samsung Galaxy S24 series and Google Pixel are growing. Stock clear cases for top 5 iPhone models and make custom orders for other phones. Buy blank cases in bulk (10-20) when on sale to reduce per-unit cost to $1-1.50.
How long do resin phone cases last?
With UV-resistant resin, phone cases last 2-3 years before yellowing becomes noticeable. Regular epoxy yellows in 6-12 months. The plastic case structure lasts indefinitely, but resin decoration may scratch with heavy use. Customers typically replace cases every 12-18 months when changing phones or wanting new designs, so longevity isn't usually an issue. Always include care instructions: hand wash only, avoid extreme heat (no car dashboards), no dishwasher.