National Facets — Weight Calculator
NATIONAL FACETS Professional Gemstone Weight Calculator

BEAD WEIGHT & STRAND PLANNER

Beads & Strand Calculator

Calculate per-bead weight and complete strand totals — including graduating strands — across all standard necklace and bracelet lengths. All dimensions in millimetres.

01 SELECT GEMSTONE
▾
02 BEAD SHAPE
03 BEAD DIMENSIONS (millimetres)
LENGTH
mm
length
WIDTH
mm
width
HEIGHT
mm
height
04 DRILL HOLE DIAMETER
mm
enter custom size above
05 STRAND TYPE
○
Enter bead dimensions above to calculate weight & strand totals

FACETED GEMSTONE WEIGHT

Stone Weight Calculator

Select stone and cut, enter three dimensions in millimetres. Carat weight is estimated using industry-standard shape factors and specific gravity values.

01 SELECT GEMSTONE
▾
02 CUT & SHAPE
03 DIMENSIONS (millimetres)
LENGTH
mm
longest axis
WIDTH
mm
widest point
DEPTH
mm
table to culet
◇
Enter dimensions to estimate weight
NATIONAL FACETS Estimates are based on geometric volume formulas and certified specific gravity values. Actual weight may vary with cutting precision, inclusions, and treatment. © PROFESSIONAL EDITION