Can I use RAINPLANER to calculate infiltration systems according to DWA-A 138?

Yes. RAINPLANER Online supports the planning and calculation of infiltration systems according to DWA-A 138-1 (10/2024), DWA-A 138 (04/2005), DIN1989-1, DIN 1986-100, DWA-A 117, DWA-M 153, ATV-A 138, DWA-A 102-1, DWA-A 102-2, BWK-A 3-1, BWK-A 3-2.

Can I calculate trenches and swales?

Yes. The tool supports trench infiltration, swale infiltration as well as combined swale-trench systems.

Is RAINPLANER an online software?

Yes. The application runs entirely web-based directly in the browser without local installation.

Is RAINPLANER free to use?

Yes. RAINPLANER Online offers a free trial version. Extended features are available through license models.

Which standards are supported by RAINPLANER?

RAINPLANER supports, among others, DWA-A 138, DWA-A 117, DWA-A 102, DIN 1986-100, DIN 1989-1, BWK-A 3 and other relevant regulations for stormwater management and infiltration.

Infiltration & Stormwater – planned professionally.

The modern web software for engineers, architects and building authorities. Calculate swales, trenches, retention and proofs directly in the browser – no installation required.

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🌐 100% Browser-based 📄 PDF Reports ☁️ Cloud Storage 🔒 Encrypted

Why RAINPLANER^®?

Clear processes, fast results and professional documentation.

Technical Calculations

Above-ground and underground infiltration and retention, flood verification and treatment, according to current standards from DWA, DIN and KOSTRA.

Fast & mobile

Optimised for desktop, tablet and smartphone – ready to use immediately without local installation.

Secure & reliable

Cloud access, automatic data backup and professional user management for teams.

Project Management

Manage multiple projects simultaneously, calculate variants and archive results.

KOSTRA-DWD

Integrated rainfall intensities directly from the KOSTRA-DWD dataset – no manual input required.

PDF Reports

Audit-ready reports at the push of a button – ready for submission to authorities and approval bodies.

What You Can Calculate

RAINPLANER^® covers all practically relevant infiltration and retention types – standard-compliant and audit-ready.

Surface Infiltration

Infiltration via unpaved or partially paved surfaces

Swale Infiltration

Infiltration via the biologically active soil zone

Trench Infiltration

Gravel and pipe trenches incl. swale-trench systems

Trench Infiltration

with modular elements, e.g. INTEWA-DRAINMAX Tunnel systems, WAVIN Aquacell, etc., incl. swale-trench elements

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Shaft Infiltration

Infiltration shafts in various designs according to DWA

Infiltration Basin

Basin infiltration in various designs

Retention Storage

According to DWA-A 117, DIN 1986-100 or simplified balance

Flood Verification

According to DIN or DWA

Treatment Requirement

Stormwater assessment according to DWA-M 153

Stormwater Management

Emission assessment according to DWA-A 102

Pipe & Channel Flow

Prandtl-Colebrook and Manning-Strickler

Partner Calculators

INTEWA DRAINMAX, RAINMASTER, PURAIN · WAVIN Stormwater Calculator · AUER Rigoletto

View all features in detail →

Supported Standards & Regulations

RAINPLANER^® calculates in compliance with regulations.

DWA-A 138-1

Planning and dimensioning of stormwater infiltration systems (10/2024)

DWA-A 117

Dimensioning of stormwater retention spaces

DWA-A 102

Principles for stormwater management

DWA-A 531

Heavy rainfall as a function of return period and duration

DWA-M 153

Recommendations for handling stormwater

DIN 1986-100

Drainage systems for buildings and properties

KOSTRA-DWD-2020

Coordinated heavy rainfall regionalisation and analysis by DWD (2020)

DWA-A 138

Planning and dimensioning of infiltration systems (04/2005)

ATV-A 138

Construction and dimensioning of decentralised infiltration systems

Plans & Pricing

Flexibly scalable – from beginner to professional. Monthly, semi-annual or annual billing.

All prices excl. VAT · Payment by invoice, credit card or direct debit · Full plan overview & plan comparison →

Trial Free use
no time limit

0 €

free of charge

Trial version

✅ Infiltration according to DWA-A 138 (2005)
✅ Infiltration according to ATV-A 138 (1990)
✅ Flood verification according to DIN 1986-100
✅ Treatment according to DWA-M 153 & DWA-A 102
✅ KOSTRA-DWD-2020 map selection
✅ PDF report (basic)
✗ DWA-A 138-1 (10/2024)
✗ Corporate design PDF
✗ Multi-user account

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Starter Short-term use
28 days

47.60 €

incl. VAT (net 40.00 €)

per 28 days

✅ Infiltration according to DWA-A 138-1 (10/2024)
✅ Flood verification according to DIN 1986-100
✅ Flood verification according to DWA-A 138-1
✅ Treatment according to DWA-A 102 & DWA-A 138-1
✅ KOSTRA-DWD-2020 map selection
✅ PDF report (basic)
✗ Infiltration according to DWA-A 138 (2005)
✗ Infiltration according to ATV-A 138 (1990)
✗ DWA-M 153

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Premium Premium License
Semi-annual subscription

214.20 €

incl. VAT (net 180.00 €)

per half-year, 180 days · semi-annual billing

✅ DWA-A 138-1 (10/2024) + DWA-A 138 (2005)
✅ Infiltration according to ATV-A 138 (1990)
✅ Treatment according to DWA-M 153, DWA-A 102 & DWA-A 138-1
✅ Flood verification DIN + DWA-AG ES-3.1 + DWA-A 138-1
✅ KOSTRA-DWD-2020 incl. UC tolerance
✅ Partner calculators (INTEWA, WAVIN, AUER)
✅ PDF incl. Corporate Design
✅ Two-factor authentication (MFA)

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Ultimate Ultimate License
Annual subscription

434.35 €

incl. VAT (net 365.00 €)

per year, 365 days · annual billing

✅ All features from Standard
✅ Multi-user account (Company Account)
✅ Electronic data exchange between accounts
✅ Full PDF customisation (Corporate Design)
✅ PDF optionally in German or English
✅ Project & calculation info at calculation level
✅ Location data as structured address

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Current prices and the full plan comparison can be found at rainplaner.net/online/pricing/.
All paid plans have no minimum contract term. All paid plans are available as a subscription and can be cancelled at any time at the end of the billing period.