All Free Crafting Calculators
Browse all 117 free calculators across 15 craft categories. Every tool uses metric measurements and UK-relevant product sizes and suppliers.
Calculators for card making, origami, bookbinding, paper trimming and paper cost estimation.
Card Size Calculator
Calculate card blank dimensions from sheet sizes with fold allowances.
Envelope Size Calculator
Find the right envelope size for your card or document dimensions.
Paper Weight Converter
Convert between GSM, lb bond, lb cover and other paper weight systems.
Origami Paper Calculator
Calculate paper size needed for origami models based on finished size.
Bookbinding Calculator
Work out spine width, cover dimensions and page signatures for bookbinding.
Paper Grain Calculator
Determine paper grain direction and its effect on folding and printing.
Score Line Calculator
Calculate score line positions for cards, boxes and folded paper projects.
Paper Trimming Calculator
Work out how many pieces you can cut from a sheet with minimal waste.
Cardstock Calculator
Calculate how many sheets of cardstock you need for your project.
Paper Cost Calculator
Estimate paper costs per sheet, per card or per project from pack prices.
Calculators for wire, beads, chains, rings, earrings, pendants and stone settings.
Wire Length Calculator
Calculate wire length needed for wraps, coils, frames and jewellery findings.
Ring Size Calculator
Convert between UK, US and EU ring sizes with circumference and diameter.
Bead Count Calculator
Work out how many beads you need for a necklace, bracelet or strand.
Chain Length Calculator
Calculate chain length for necklaces and bracelets with clasp allowance.
Jump Ring Calculator
Calculate jump ring sizes, aspect ratios and quantities for chainmaille.
Clasp Size Calculator
Determine the right clasp size based on chain weight and jewellery style.
Earring Weight Calculator
Estimate earring weight from materials to ensure comfortable wearability.
Pendant Size Calculator
Calculate pendant proportions, bail size and chain compatibility.
Bracelet Size Calculator
Determine bracelet length from wrist measurement with comfort allowance.
Stone Setting Calculator
Calculate bezel height, prong length and setting dimensions for gemstones.
Ring Blank Calculator
Calculate metal strip dimensions needed for a ring blank given ring size and band width.
Wire Wrapping Calculator
Calculate wire length needed for wrapping projects based on stone size and wrap style.
Wire Gauge Calculator
Calculate wire diameter, weight, resistance and cost estimate for craft and jewellery wire by Standard Wire Gauge (SWG).
Calculators for wax weight, fragrance oil, wick sizing, container volume, dye and burn time.
Wax Weight Calculator
Calculate how much wax you need to fill your candle containers.
Fragrance Oil Calculator
Work out fragrance oil amounts based on wax weight and fragrance load percentage.
Wick Size Calculator
Find the correct wick size for your candle diameter and wax type.
Container Volume Calculator
Calculate the volume of round, square or irregular candle containers.
Dye Amount Calculator
Work out how much candle dye to add for your desired colour intensity.
Melt Pool Calculator
Estimate melt pool diameter and depth for proper candle performance.
Burn Time Calculator
Estimate candle burn time based on wax weight and wick consumption rate.
Wax Melting Point Calculator
Compare melting points and choose the right wax blend for your candles.
Candle Cost Calculator
Calculate the total cost to make a candle including wax, fragrance, wick and jar.
Pour Temperature Calculator
Determine optimal pouring temperature for different wax types and containers.
Fragrance Blend Library Calculator
Create fragrance blends with proper weight ratios, flashpoint checks and blend strength categories.
Wax Melt Calculator
Calculate wax, fragrance oil, dye and cure time for wax melt moulds including clamshell, heart and star shapes.
Fragrance Load Calculator
Calculate max fragrance oil amount based on wax type and weight with flash point warnings.
Container Fill Calculator
Calculate wax weight needed to fill containers with headroom allowance.
Calculators for lye amounts, oil ratios, fragrance loads, mould volumes and saponification.
Lye Calculator
Calculate sodium hydroxide (NaOH) or potassium hydroxide (KOH) amounts for cold process soap.
Oil Ratio Calculator
Balance your soap recipe oils for hardness, lather, conditioning and cleansing.
Fragrance Load Calculator
Work out safe fragrance or essential oil amounts for soap batches.
Mould Volume Calculator
Calculate soap mould volume and the total oil weight needed to fill it.
SAP Value Calculator
Look up and calculate saponification values for common soap-making oils.
Water Discount Calculator
Calculate water amounts using full water or water discount methods.
Superfat Calculator
Adjust your lye amount for the desired superfat percentage in cold process soap.
Batch Size Calculator
Scale soap recipes up or down while keeping oil ratios consistent.
Soap Cost Calculator
Calculate the total cost per bar including all oils, lye, fragrance and additives.
Cure Time Calculator
Estimate soap cure time based on recipe composition and environmental conditions.
Water Hardness Soap Calculator
Adjust your soap recipe for water hardness with chelating agent amounts and superfat recommendations.
Soap Curing Tracker
Track soap curing time, weight loss, hardness, pH timeline and storage for cold process, hot process and melt and pour soap.
Lye Discount Calculator
Calculate superfat percentage and adjusted lye amounts for soap recipes.
Essential Oil Calculator
Calculate safe essential oil percentages for soap by oil type and usage rate following IFRA guidelines.
Calculators for resin volume, hardener ratios, pigment amounts, curing times and costs.
Resin Volume Calculator
Calculate the total resin volume needed for moulds of various shapes.
Hardener Ratio Calculator
Work out exact resin-to-hardener ratios by weight or volume for perfect curing.
Pigment Amount Calculator
Calculate the right amount of pigment, dye or mica powder for resin.
Mould Fill Calculator
Estimate resin needed to fill silicone moulds accounting for embedded objects.
Curing Time Calculator
Estimate resin curing time based on type, volume and ambient temperature.
Resin Cost Calculator
Calculate the material cost per resin piece including resin, hardener and pigment.
Bubble Prevention Calculator
Calculate optimal mixing times and temperatures to minimise resin bubbles.
Layer Depth Calculator
Plan resin pour layers with timing and volume for multi-layer projects.
Resin Cure Environment Calculator
Calculate optimal curing conditions for resin based on type, temperature, humidity and project size.
Mould Volume Calculator
Calculate resin volume for common mould shapes including rectangle, cylinder, dome and sphere.
Resin Coaster Calculator
Calculate resin volume for round, square and hexagonal coasters with pigment amounts.
Resin River Table Calculator
Calculate resin volume and cost for river table projects from dimensions and void ratio.
Resin Mixing Calculator
Calculate exact hardener amounts, total mixed volume, adjusted pot life, cure time estimate and exotherm risk for epoxy and polyester resin projects.
Calculators for cord length, knot count, wall hangings, plant hangers and pattern repeats.
Cord Length Calculator
Calculate total cord length needed for macrame projects based on finished size.
Knot Count Calculator
Estimate the number of knots and cord usage for common macrame patterns.
Wall Hanging Calculator
Calculate cord lengths and quantities for macrame wall hangings.
Plant Hanger Calculator
Work out cord requirements for macrame plant hangers by pot size.
Macrame Curtain Calculator
Calculate cord and dowel requirements for macrame curtains and room dividers.
Fringe Length Calculator
Calculate cord lengths for fringe and tassel additions to projects.
Cord Weight Calculator
Estimate the total weight of cord needed to check you have enough on your reel.
Pattern Repeat Calculator
Calculate how many pattern repeats fit across a given width or length.
Calculators for vinyl sheets, stencils, transfer tape, heat press, sublimation and decals.
Vinyl Sheet Calculator
Calculate how much vinyl you need from roll widths and design dimensions.
Stencil Size Calculator
Work out stencil dimensions with border allowance for clean application.
Transfer Tape Calculator
Calculate transfer tape length needed for your vinyl designs.
Weeding Area Calculator
Estimate weeding time and complexity based on design area and detail.
Heat Press Calculator
Find the right temperature, time and pressure for HTV on different fabrics.
Sublimation Calculator
Calculate sublimation ink coverage and substrate sizing for transfers.
Decal Size Calculator
Scale decal designs proportionally for different surfaces and applications.
Material Cost Calculator
Estimate vinyl or stencil material cost per project from roll prices.
Calculators for fabric dye, tie dye, acrylic pour, paint volume, colour mixing and spray paint.
Fabric Dye Calculator
Calculate dye powder or liquid amounts based on fabric weight and depth of colour.
Tie Dye Calculator
Work out dye solution volumes and fabric prep amounts for tie dye projects.
Acrylic Pour Calculator
Calculate paint, pouring medium and silicone amounts for acrylic pour art.
Paint Volume Calculator
Estimate paint volume needed for craft surfaces based on area and coats.
Colour Mixing Calculator
Calculate paint mixing ratios to achieve target colours from primaries.
Brush Size Calculator
Find the right brush size for your painting area and detail level.
Stencil Paint Calculator
Calculate paint quantities for stencilled designs on fabric or walls.
Spray Paint Calculator
Estimate spray paint cans needed based on surface area and coverage per can.
Calculators for gift wrap, ribbon, boxes, tissue paper, bags, tags, bows and hampers.
Gift Wrap Calculator
Calculate wrapping paper size needed for boxes of any dimension.
Ribbon Length Calculator
Work out ribbon length for bows, wrapping and decoration.
Gift Box Calculator
Calculate card or board dimensions to construct gift boxes from flat sheets.
Tissue Paper Calculator
Estimate tissue paper sheets needed for gift bags and box filling.
Gift Bag Size Calculator
Find the right gift bag size for your item dimensions.
Gift Tag Calculator
Calculate how many tags you can cut from a sheet of card.
Bow Size Calculator
Calculate ribbon length needed to make bows of different styles and sizes.
Hamper Size Calculator
Estimate hamper basket or box size needed for your gift items.
Business calculators for pricing, profit margins, Etsy fees, market stalls and postage costs.
Cost Per Item Calculator
Calculate the total cost to make each item including materials, time and overheads.
Selling Price Calculator
Work out the right selling price based on costs, desired margin and platform fees.
Material Cost Calculator
Track and total material costs across multiple supplies for a project.
Time Calculator
Calculate your effective hourly rate from time spent and items produced.
Profit Margin Calculator
Calculate gross and net profit margins on your handmade products.
Market Stall Calculator
Work out break-even and profit targets for craft market stalls and fairs.
Etsy Fee Calculator
Calculate Etsy listing, transaction and payment processing fees on your sales.
Postage Calculator
Estimate Royal Mail and courier postage costs by weight and parcel size.
Calculators for paper crafts, card making, shrink plastic, embossing and paper material techniques.
Shrink Plastic Calculator
Calculate starting dimensions for shrink plastic based on desired finished size and material type.
Envelope Size Calculator
Calculate envelope dimensions needed for a given card or document size with clearance allowance.
Bookbinding Calculator
Calculate paper, board, cloth, and spine dimensions for hand-bound books.
Business planning calculators for craft shows, inventory management, pricing and revenue forecasting.
Useful reference guides and charts for crafting materials, sizes and specifications.
Candle Wax Comparison Chart
Compare soy, paraffin, beeswax, coconut and rapeseed wax for melt point, scent throw and burn time.
UK Envelope Sizes Reference
UK envelope sizes including C-series, DL dimensions and Royal Mail letter limits.
Paper & Card Weight Guide
GSM explained with common weights from 80gsm to 350gsm and UK vs US system conversion.
UK Ring Size Chart
UK letter sizes A to Z with inner diameter, circumference and US and EU equivalents.
Calculators for pottery glazing, clay shrinkage, kiln loading and ceramic techniques.
Glaze Thickness Calculator
Calculate number of glaze coats and total glaze volume needed for a piece based on surface area.
Shrinkage Calculator
Calculate wet clay dimensions needed to achieve desired finished size after firing shrinkage.
Kiln Loading Calculator
Calculate kiln shelf usage, pieces per firing and electricity cost per firing.
Clay Weight Calculator
Calculate clay weight needed for common pottery forms including bowls, mugs, plates and vases.
Calculators for leather cutting, weight conversion, stitching and leatherwork project planning.
Why Use CraftCalcs?
Every calculator on this page is completely free, requires no signup, and works on any device. All tools use metric measurements and UK-relevant product sizes, densities and pricing.
Whether you're calculating wax weight for candles, lye amounts for soap, resin volumes for moulds, or pricing products for your Etsy shop, CraftCalcs helps you get accurate estimates quickly. Results include wastage allowances and let you input your own material prices for cost estimates tailored to your suppliers.