Resin Volume Calculator
Calculate UV resin volume needed for SLA/DLP prints from model volume and supports. Enter values for instant results with step-by-step formulas.
Calculator
Adjust values & calculateFormula
Model volume comes from your slicer or CAD software. Support volume is a percentage based on density. Vat loss (typically 8%) accounts for resin left on the FEP and tank. Hollowing reduces model volume by subtracting the inner cavity.
Last reviewed: December 2025
Worked Examples
Example 1: Miniature Figure with Medium Supports
Example 2: Large Hollow Bust with Heavy Supports
Background & Theory
The Resin Volume Calculator applies the following established principles and formulas. Hobbies and crafts encompass an extraordinarily diverse range of practical skills, each with its own embedded mathematics. In knitting and crochet, yarn weight classification (lace, fingering, sport, worsted, bulky) determines gauge, typically expressed as stitches per 10 cm or per 4 inches. Yardage calculation requires knowing the area to be covered, the stitch pattern's yarn consumption rate, and a swatch-verified gauge, making it essential to buy sufficient yarn before a dye lot is exhausted. Fabric requirement calculation for sewing projects involves scaling a pattern to the correct size, accounting for seam allowances, fabric grain direction, and pattern repeat in printed textiles. Wood measurement in the United States commonly uses board feet, a volume unit defined as 1 inch × 12 inches × 12 inches. A board 2 inches thick, 6 inches wide, and 8 feet long contains (2 × 6 × 96) / 144 = 8 board feet. This unit allows lumber to be priced by volume regardless of dimensional format. Photography's exposure triangle describes the interdependence of aperture (f-stop), shutter speed, and ISO sensitivity in determining correct exposure. Each stop of change in any one variable doubles or halves the light reaching the sensor; maintaining correct exposure requires compensating with equal and opposite stops in one or more of the other variables. Music tempo is measured in beats per minute (BPM), and the mathematical relationship between BPM and note duration is precise: at 120 BPM, a quarter note lasts exactly 500 milliseconds, an eighth note 250 milliseconds, and a dotted quarter note 750 milliseconds. This relationship is fundamental to sequencing software, metronome use, and synchronising audio with video. Colour mixing in paint or pigment follows subtractive colour theory, where mixing primaries in specific ratios produces predictable secondary and tertiary colours, though the exact outcome depends on the pigment density and medium. Origami design relies on the consistent proportionality of square paper, with base fold ratios governing the proportions of the finished model.
History
The history behind the Resin Volume Calculator traces back through the following developments. Craft production has been central to human culture for millennia, but the social organisation of skilled making underwent a decisive transformation in medieval Europe with the formation of craft guilds. These associations regulated training through apprenticeship, maintained quality standards, and controlled access to trade in specific goods such as textiles, metalwork, and woodworking. The guild system began to decline with industrialisation in the 18th and 19th centuries, as machine production displaced artisan labour. A cultural reaction to industrialisation emerged in Britain in the 1880s through the Arts and Crafts Movement, led by designer and theorist William Morris. Morris advocated for the intrinsic value of handmade objects and sought to restore dignity to craft labour, influencing architecture, textile design, book arts, and furniture making across Britain and the United States. The Victorian era also saw a broad expansion of middle-class hobby culture, with pursuits such as watercolour painting, embroidery, botanical illustration, and amateur natural history becoming markers of respectable leisure. The post-World War II period brought mass commercialisation of hobby supplies, as rising consumer incomes and the growth of the suburban lifestyle created demand for craft kits, model making, and DIY home improvement. Specialty retailers and hobby magazines proliferated through the 1950s and 1960s. The maker culture revival of the early 21st century represented a second wave of reaction to mass production, this time catalysed by digital fabrication technologies. Make magazine, launched in 2005, became the flagship publication for a community combining traditional craft skills with electronics, 3D printing, laser cutting, and open-source software. The democratisation of 3D printing through affordable desktop machines from around 2010 allowed hobbyists to design and produce custom parts, figurines, and tools at home. Online craft communities including Etsy, launched in 2005 as a marketplace for handmade goods, and Ravelry, founded in 2007 as a social network for knitters and crocheters, created global infrastructure for craft sharing, pattern distribution, and materials exchange.
Frequently Asked Questions
Sources & References
Formula
Total Resin = (Model Volume + Support Volume) x Copies + Vat Loss
Model volume comes from your slicer or CAD software. Support volume is a percentage based on density. Vat loss (typically 8%) accounts for resin left on the FEP and tank. Hollowing reduces model volume by subtracting the inner cavity.
Worked Examples
Example 1: Miniature Figure with Medium Supports
Problem: A 28mm tabletop miniature has a model volume of 8 cm3. Print 4 copies with medium supports, solid (not hollow), at 0.05mm layer height. Resin costs $35/liter.
Solution: Model volume = 8 cm3 per copy\nSupports (20%) = 8 x 0.20 = 1.6 cm3\nTotal per copy = 8 + 1.6 = 9.6 cm3\nAll 4 copies = 9.6 x 4 = 38.4 cm3 = 38.4 mL\nVat loss (8%) = 38.4 x 0.08 = 3.07 mL\nGrand total = 38.4 + 3.07 = 41.5 mL = 0.0415 L\nCost = 0.0415 x $35 = $1.45
Result: 41.5 mL total resin | $1.45 cost | ~16.7 hours print time
Example 2: Large Hollow Bust with Heavy Supports
Problem: A display bust has 350 cm3 volume, hollowed with 2.5mm walls. Heavy supports, 1 copy, 0.05mm layers, 120mm tall. Resin costs $40/liter.
Solution: Outer radius equivalent = (3 x 350 / 4pi)^(1/3) = 4.37 cm\nInner radius = 4.37 - 0.25 = 4.12 cm\nInner volume = 4/3 x pi x 4.12^3 = 292.9 cm3\nShell volume = 350 - 292.9 = 57.1 cm3\nHeavy supports (35%) = 57.1 x 0.35 = 20.0 cm3\nTotal = 57.1 + 20.0 = 77.1 cm3 = 77.1 mL\nVat loss = 77.1 x 0.08 = 6.2 mL\nGrand total = 83.3 mL = 0.0833 L\nCost = 0.0833 x $40 = $3.33
Result: 83.3 mL total resin | $3.33 cost | Saved ~267 mL by hollowing
Frequently Asked Questions
How do I find the volume of my 3D model for resin printing?
Most 3D slicing software used for SLA and DLP printing displays model volume automatically. In ChiTuBox, the volume appears in the model information panel after loading your STL or OBJ file. Lychee Slicer shows volume in the model properties section. PrusaSlicer also calculates and displays volume for resin printer profiles. If you are using CAD software, programs like Fusion 360, Blender, and Meshmixer can calculate mesh volume directly. In Blender, select your model, go to the Mesh menu, and choose 'Print3D Check All' to see the volume. For quick estimates without software, you can approximate simple shapes using geometric formulas. The volume is typically displayed in cubic millimeters or cubic centimeters, and you may need to convert units depending on your slicer settings.
How much resin do supports typically use in SLA and DLP printing?
Support structures in resin printing typically consume 10 to 50 percent additional resin beyond the model volume, depending on several factors. Light supports with thin contact points and minimal density add approximately 10 to 15 percent. Medium supports, which are the default in most slicers, add about 20 to 25 percent. Heavy supports needed for large overhangs, flat surfaces, or complex geometries can add 35 to 50 percent or more. The orientation of your model on the build plate has the largest impact on support volume. Printing at an angle usually requires more supports but produces better surface quality and reduces suction forces on the FEP film. Some advanced techniques like using internal supports or tree supports can reduce material usage while maintaining print reliability and structural integrity during the printing process.
Should I hollow my resin prints and how does it save material?
Hollowing is one of the most effective ways to reduce resin consumption, especially for larger models. A solid 50mm cube uses about 125 cm3 of resin, while the same cube hollowed with 2mm walls uses approximately 28 cm3, a savings of nearly 78 percent. However, hollowing requires careful consideration. You must add drain holes (at least 2, typically 3-4mm diameter) so uncured resin can escape from the interior after printing. Without drain holes, trapped liquid resin will remain inside, potentially causing the model to crack or leak over time. Wall thickness should typically be at least 1.5 to 2mm for standard prints and 2.5 to 3mm for functional parts. Always add internal supports or infill structures for large hollow areas to prevent the walls from collapsing during printing due to suction forces.
What are the hidden costs and waste factors in resin 3D printing?
Beyond the direct resin consumed by your model and supports, several additional factors affect total resin usage and cost. FEP film replacement is a recurring expense, typically lasting 20 to 40 prints before needing replacement at $5 to $15 per sheet. Resin left on the FEP and in the vat after printing accounts for roughly 5 to 10 percent waste. Failed prints are a significant hidden cost, especially when learning, with failure rates of 10 to 20 percent being common. Post-processing materials including isopropyl alcohol or water-washable cleaning solution, nitrile gloves, paper towels, and UV curing lights add ongoing costs. Resin has a shelf life of approximately 12 to 18 months and must be stored properly away from UV light. Some specialty resins like flexible, tough, or castable formulations cost two to three times more than standard resins, so accurate volume estimation becomes even more important.
What types of resin are available and how do they differ in cost?
Standard UV-curing resins are the most affordable option, typically costing 25 to 40 dollars per liter and suitable for display models, miniatures, and prototypes. ABS-like or tough resins offer improved impact resistance and flexibility at 35 to 55 dollars per liter, making them better for functional parts. Water-washable resins eliminate the need for isopropyl alcohol during cleanup and cost 30 to 50 dollars per liter. Dental and biocompatible resins are specialized formulations that meet medical-grade standards and can cost 80 to 200 dollars per liter. Castable resins designed for lost-wax jewelry casting burn out cleanly and typically cost 50 to 80 dollars per liter. Choosing the right resin for your application prevents waste from using premium material where standard resin would suffice.
How do I reduce failed prints and minimize resin waste?
Print failures are the single largest source of resin waste for most hobbyists. Proper model orientation is the most important factor, as orienting flat surfaces away from the build plate reduces suction forces that cause delamination. Using adequate support structures prevents unsupported islands from falling into the vat. Calibrating your exposure settings for each resin type ensures proper layer adhesion without over-curing. Keeping the FEP film clean and replacing it when it becomes cloudy or scratched prevents adhesion failures. Filtering resin after each print through a fine mesh strainer removes cured debris that can cause defects in subsequent prints. Maintaining a consistent ambient temperature of 20 to 25 degrees Celsius also improves print reliability.
References
Reviewed by Daniel Agrici, Founder & Lead Developer · Editorial policy