diff --git a/planner.py b/planner.py
index 57b7223..2180de4 100644
--- a/planner.py
+++ b/planner.py
@@ -498,35 +498,36 @@ class ScheduledBooking(DeactivableMixin, ModelSQL, ModelView):
         IrDate = pool.get('ir.date')
         Line = pool.get('cashbook.line')
         Currency = pool.get('currency.currency')
-        Cashbook = pool.get('cashbook.book')
 
-        def add_asset_values(aline):
+        def add_asset_values(aline, from_book, to_book):
             """ compute quantity from rate of asset and
                 amount to invest
 
             Args:
                 aline (dict): prepared dictionary to create
                     cashbook-line-record
+                from_book (record): cashbook record,
+                to_book (record): cashbook record
 
             Returns:
                 dict: dictionary to create cashbook-line record
             """
-            from_book = Cashbook(aline['cashbook'])
-            to_book = Cashbook(aline['booktransf'])
-
-            # add 2nd currency if currencies are different
-            aline = Line.add_2nd_currency(aline, from_book.currency)
-            target_amount = aline.get('amount_2nd_currency', aline['amount'])
-            asset_rate = to_book.asset.rate
             with Transaction().set_context({'date': aline['date']}):
-                # convert rate of asset to currency of target-cashbook
-                asset_rate = Currency.compute(
-                    to_book.asset.currency, asset_rate, to_book.currency,
-                    round=False)
-            aline['quantity'] = Decimal('0.0')
-            if asset_rate:
-                aline['quantity'] = (target_amount / asset_rate).quantize(
-                    Decimal(Decimal(1) / 10 ** to_book.quantity_digits))
+                # convert amount to target-currency
+                target_amount = Currency.compute(
+                    from_book.currency, aline['amount'],
+                    to_book.currency, round=False)
+                # convert asset-rate of target-cashbook to target-currency
+                asset_rate = (Currency.compute(
+                    to_book.asset.currency, to_book.asset.rate,
+                    to_book.currency, round=False) * Decimal(
+                        to_book.asset.uom.factor /
+                        to_book.quantity_uom.factor))
+
+                aline['quantity'] = Decimal('0.0')
+                if asset_rate:
+                    aline['quantity'] = (target_amount / asset_rate).quantize(
+                        Decimal(Decimal(1) / 10 ** to_book.quantity_digits))
             return aline
 
         to_create = []
@@ -548,7 +549,8 @@ class ScheduledBooking(DeactivableMixin, ModelSQL, ModelView):
                 if record.booktransf:
                     line['booktransf'] = record.booktransf.id
                     if record.booktransf.feature == 'asset':
-                        line.update(add_asset_values(line))
+                        line.update(add_asset_values(
+                            line, record.cashbook, record.booktransf))
 
             if record.wfcheck:
                 to_create_check.append(line)
diff --git a/tests/planner.py b/tests/planner.py
index 6720696..7930d90 100644
--- a/tests/planner.py
+++ b/tests/planner.py
@@ -632,6 +632,8 @@ class PlannerTestCase(object):
         Category = pool.get('cashbook.category')
         Cashbook = pool.get('cashbook.book')
         Currency = pool.get('currency.currency')
+        Uom = pool.get('product.uom')
+        Asset = pool.get('investment.asset')
 
         company = self.prep_company()
         with Transaction().set_context({'company': company.id}):
@@ -657,15 +659,41 @@ class PlannerTestCase(object):
             job = self.prep_create_job()
             self.assertEqual(job.cashbook.rec_name, 'Book 1 | 0.00 € | Open')
 
+            uom_u, = Uom.search([('symbol', '=', 'u')])
+            self.assertEqual(uom_u.factor, Decimal('1.0'))
+            self.assertEqual(uom_u.rate, Decimal('1.0'))
+
+            uom_10u, = Uom.create([{
+                'category': uom_u.category.id,
+                'name': '10 Units',
+                'symbol': '10xU',
+                'factor': Decimal('10.0'),
+                'rate': Decimal('0.1'),
+                'rounding': Decimal('0.01'),
+                'digits': 2}])
+            self.assertEqual(uom_10u.factor, Decimal('10.0'))
+            self.assertEqual(uom_10u.rate, 0.1)
+            # check conversion: 1 [u] = 0.1 [10xU]
+            self.assertEqual(Uom.compute_qty(uom_u, 1.0, uom_10u), 0.1)
+
             # asset-cashbook in CHF
             Cashbook.write(*[[asset_book], {'currency': chf.id}])
             self.assertEqual(
                 asset_book.rec_name,
                 'Depot | 0.00 SFr | Open | 0.0000 u')
-            # rate of asset = 12.5 usd
+
+            Asset.write(*[
+                [asset_book.asset],
+                {
+                    'uom': uom_10u.id,
+                    'rates': [(
+                        'write',
+                        [asset_book.asset.rates[0]],
+                        {'rate': Decimal('1.25')})]}])
+            # rate of asset = 1.25 usd
             self.assertEqual(
                 asset_book.asset.rec_name,
-                'Product 1 | 12.5000 usd/u | 05/02/2022')
+                'Product 1 | 1.2500 usd/10xU | 05/02/2022')
             self.assertEqual(len(asset_book.lines), 0)
 
         IrDate.today = MagicMock(return_value=date(2022, 5, 24))
@@ -700,7 +728,8 @@ class PlannerTestCase(object):
             self.assertEqual(chf.rate, Decimal('0.95'))
             self.assertEqual(euro.rate, Decimal('1.0'))
             self.assertEqual(usd.rate, Decimal('1.05'))
-            self.assertEqual(asset_book.asset.rate, Decimal('12.5'))
+            self.assertEqual(asset_book.asset.rate, Decimal('1.25'))
+            self.assertEqual(asset_book.asset.uom.factor, Decimal('10.0'))
 
             # we invest 10€
             # transfer to chf-account, buy asset with rate in usd