Concrete Gutter Calculator
This concrete gutter calculator sizes valley gutters, spoon drains and standalone gutter flags — a long, shallow slab poured to fall. Enter run length, width and thickness.
Comment utiliser ce calculateur
- Saisissez vos dimensions — pieds pour les longueurs, pouces pour l'épaisseur.
- Ajustez les options — pourcentage de perte, taille du sac et prix local du béton.
- Lisez vos résultats — le volume, les sacs, le poids et le coût se mettent à jour en direct.
La formule
Gutter volume = Run length × Width × Thickness Exemple résolu : A 50 ft valley gutter, 24 in wide × 6 in thick: 50 × 2 × 0.5 = 50 ft³ ≈ 1.85 yd³.
A concrete gutter is hydraulically shaped but volumetrically simple: treat it as a slab strip at the gutter's average thickness. Dished spoon drains average their deepest and edge thickness.
Combined curb-and-gutter sections belong in the curb calculator, which adds the curb face prism on top of the gutter flag; this page is for gutter-only pours — driveways crossings, valley gutters and drainage flags.
Gutters take abuse from water and wheel loads: use 4,000 psi (M30) air-entrained mix in freeze-thaw regions and cut joints to match the adjacent pavement.
Foire aux questions
Questions courantes sur le concrete gutter calculator.
How much concrete for a valley gutter?
Run length × width × average thickness. A 100 ft gutter 2 ft wide at 6 in averages 100 ft³ ≈ 3.7 yd³.
What thickness should a concrete gutter be?
6 inches for vehicle-crossed gutters, 4 inches for landscape drainage flags. Match or exceed the adjoining pavement thickness.
How do I measure a dished (spoon) gutter?
Use the average of the center depth and edge depth as your thickness — a 8 in center / 4 in edge dish averages 6 inches.
Curb and gutter together?
Use the curb calculator — it combines the curb face and gutter flag in one cross-section.
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