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🔨 बांधकाम व DIY

काँक्रीट व्हॉल्यूम व बॅग्ज कॅल्क्युलेटर

स्लॅब, फूटिंग, कॉलम, पायऱ्या आणि पोस्ट होलसाठी काँक्रीट व्हॉल्यूम (yd³ / m³) काढा, तसेच किती 40lb / 60lb / 80lb / 25kg बॅग्ज मिक्स खरेदी करायचे. 10% वेस्टेज गृहीत धरलेले.

ft
ft
in
आवश्यक काँक्रीट
0.00 yd³
0.00 m³ · 0.0 ft³
बॅगचा आकारआवश्यक बॅग्स
गणित कसे काम करते

स्लॅब / फुटिंग: आकारमान = लांबी × रुंदी × खोली. खांब / पोस्ट होल: आकारमान = π × त्रिज्या² × उंची. जिना: एकत्रित ब्लॉक्स म्हणून अंदाजित — पायरी i साठी rise×(i×run)×width इतके क्षेत्र असते, सर्व पायऱ्यांची बेरीज केली जाते.

बॅगमधून मिळणारे प्रमाण: 40 lb → 0.011 yd³ (0.30 ft³), 60 lb → 0.017 yd³ (0.45 ft³), 80 lb → 0.022 yd³ (0.60 ft³), 25 kg → 0.0125 m³, 30 kg → 0.015 m³.

10% वाया जाण्याचा घटक असमान सब-ग्रेड, सांडणे आणि थोडे जास्त ऑर्डर करणे लक्षात घेतो — निवासी ओतकामासाठी ही उत्तम पद्धत आहे.

गणित कसे काम करते

Three geometries share one output. Slab / footing is length × width × depth. Column / post hole is π × radius² × height, multiplied by your quantity. Stairs are summed as cumulative blocks: step i contributes rise × (i × run) × width, added across every step, which is how a poured monolithic flight actually stacks. Everything is computed in cubic feet, multiplied by 1.10 while the waste toggle is on, then reported as cubic yards (÷ 27), cubic metres (× 0.0283168) and cubic feet.

Watch the unit pairing: in imperial mode the large dimensions are feet while depth, diameter, rise, run and stair width are inches; in metric mode they become metres and centimetres. The default slab is 10 × 10 ft at 4 in deep. The bag table converts your volume against fixed yields — 40 lb at 0.30 ft³, 60 lb at 0.45 ft³, 80 lb at 0.60 ft³, plus 25 kg and 30 kg European sizes — and always rounds up to whole bags.

The 10 percent waste factor is a residential rule of thumb covering spillage and an uneven sub-grade; it is not a substitute for measuring an over-dug footing trench, which can swallow far more. Rebar, mesh and embedded post volume are not deducted, and stair side walls, landings and open risers are not modelled at all. For anything you are ordering ready-mix against, treat the figure as a shopping estimate and confirm with your supplier before the truck is booked.

वारंवार विचारले जाणारे प्रश्न

How many 80 lb bags of concrete make a cubic yard?

About 46. The tool uses a yield of 0.022 cubic yards, or 0.60 cubic feet, per 80 lb bag, so a full yard takes 45.5 bags and the table rounds that up. Sixty pound bags need roughly 60, and 40 lb bags about 91.

Should I leave the +10% waste toggle on?

For most residential pours, yes. It is on by default and multiplies the raw volume by 1.10 to cover spillage, an uneven base and slight over-ordering. Switch it off only when you want the exact geometric volume, for example when checking a supplier's own quote.

How do I calculate concrete for a round post hole?

Choose the Column / post hole shape. Enter the hole diameter in inches, the depth in feet, and set Quantity to the number of holes. The tool applies π × radius² × height per hole and multiplies through, so all your posts come out in one figure.

Does the stairs mode include the side walls or a landing?

No. Stairs are summed purely as stacked rectangular blocks, step by step. Cheek walls, a top landing, a thickened base and any hollow or backfilled void underneath are not included, so a real flight with side walls will need meaningfully more concrete.

Why does the depth field use inches when length uses feet?

Because that is how slabs are specified in practice: a 10 by 10 foot pad at 4 inches deep. The tool converts internally, dividing inch values by 12 and centimetre values by 30.48, so you never have to enter a fractional foot.

यालाच असेही म्हणतात

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