Free standard shipping on eligible US orders $500+

LIMA Air Duct Calculator HVAC Tool – Duct Size Converter & Velocity Estimator

SKU: N/A

$19.80

In stock

Same-item volume pricing
QuantityUnit priceSaving
1–4$19.800%
5–9$18.815%
10+$17.8210%

Estimate for this quantity before shipping. Tax display follows store settings. Existing cart quantities can increase the tier. Only one offer applies; a coupon replaces automatic pricing. For 20+ units, contact support for a quote.

Available to order: 5.

Bulk quantity & quote

Enter the total quantity you need. We will confirm availability and a quote before you order.

Request this quantity →

LIMA Air Duct Calculator – Professional HVAC Sizing Tool

This durable HVAC air duct calculator from LIMA is an essential tool for contractors, engineers, and technicians. Designed for field and shop use, it provides a fast and accurate way to calculate:

  • Duct conversion from round to equivalent rectangular sizing

  • Register & grille selection for effective air velocity, CFM throw, and terminal pressure loss

  • Duct weight per linear foot, simplifying material and cost estimates

Features:

  • Intuitive slide calculator design

  • Ideal for ductwork layout and sizing during system installation or retrofits

  • Used in HVAC performance evaluation and airflow diagnostics

  • Compact and easy to store in tool bags or field kits

Model: Air Duct Calculator

Brand: LIMA

REM Number: 4G8341

Made for: HVAC airflow systems – not intended for gas systems

Whether you’re sizing duct registers, estimating weight, or checking airflow, this is your go-to manual calculator for quick reference in the field.

Product details

Part / SKU N/A

Package includes

  • LIMA Air Duct Calculator HVAC Tool – Duct Size Converter & Velocity Estimator

Included components and any stated pack quantity are as described in this listing. Optional accessories shown separately are sold separately unless expressly included above.

Explore related products

More products in this category. Compare specifications and fit for your application.